Focal seizures
- Overview
- Theory
- Diagnosis
- Management
- Follow up
- Resources
Treatment algorithm
Please note that formulations/routes and doses may differ between drug names and brands, drug formularies, or locations. Treatment recommendations are specific to patient groups: see disclaimer
acute repetitive seizures: in the community
benzodiazepine
There is no well-established definition of acute repetitive seizures. One frequently used definition is three or more seizures within 24 hours for patients whose habitual seizure frequency is fewer than three seizures per day, with return to full alertness between seizures. Other definitions include two or more seizures in 6 hours, two or more seizures in 24 hours, or two to four seizures in less than 48 hours.[64]Jafarpour S, Hirsch LJ, Gaínza-Lein M, et al. Seizure cluster: definition, prevalence, consequences, and management. Seizure. 2019 May;68:9-15. https://www.seizure-journal.com/article/S1059-1311(18)30112-2/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29871784?tool=bestpractice.com
Caregivers should be trained to administer treatments as soon as possible when the seizure clusters are identified, without the need for the patient to attend the hospital. Treatment options include diazepam rectal gel, intranasal formulations of midazolam and diazepam, and a buccal formulation of midazolam (available only in Europe). These benzodiazepine formulations have shown reasonable efficacy, equal to or better than that of intravenous formulations, in most patients. Oral benzodiazepines (e.g., lorazepam) can be used if the above formulations are not available or in patients in whom the rectal route is less favored (adults), provided that the patient is awake and cooperative, and the risk of aspiration is low or not a concern.[62]Gidal B, Klein P, Hirsch LJ. Seizure clusters, rescue treatments, seizure action plans: unmet needs and emerging formulations. Epilepsy Behav. 2020 Nov;112:107391. https://www.epilepsybehavior.com/article/S1525-5050(20)30570-9/fulltext http://www.ncbi.nlm.nih.gov/pubmed/32898744?tool=bestpractice.com [63]Mesraoua B, Abou-Khalil B, Hosni Khodair R, et al. Seizure clusters. J Drug Assess. 2021 Aug 14;10(1):86-90. https://www.tandfonline.com/doi/full/10.1080/21556660.2021.1962671 http://www.ncbi.nlm.nih.gov/pubmed/34408916?tool=bestpractice.com
Primary options
diazepam rectal: children 2-5 years of age: 0.5 mg/kg rectally as a single dose; children 6-11 years of age: 0.3 mg/kg rectally as a single dose; children ≥12 years of age and adults: 0.2 mg/kg rectally as a single dose
More diazepam rectalMay repeat dose in 4-12 hours. Maximum 1 treatment every 5 days or up to 5 treatments per month.
OR
diazepam nasal: children ≥6 years of age: consult specialist for guidance on dose; adults body weight 51-75 kg: 15 mg intranasally (one 7.5 mg spray into each nostril); adults body weight ≥75 kg: 20 mg intranasally (one 10 mg spray into each nostril)
More diazepam nasalMay repeat dose after at least 4 hours. Maximum 2 doses per single episode and 1 episode every 5 days or up to 5 episodes per month.
OR
midazolam nasal: children ≥12 years of age and adults: 5 mg intranasally (as one spray into one nostril)
More midazolam nasalMay repeat dose once in opposite nostril after 10 minutes. Maximum 2 doses per single episode and 1 episode every 3 days or up to 5 episodes per month.
Secondary options
lorazepam: children: consult specialist for guidance on dose; adults: 4 mg orally as a single dose, may repeat once after 10-15 minutes
acute repetitive seizures: in the hospital
intravenous benzodiazepine or anticonvulsant
There is no well-established definition of acute repetitive seizures. One frequently used definition is three or more seizures within 24 hours for patients whose habitual seizure frequency is fewer than three seizures per day, with return to full alertness between seizures. Other definitions include two or more seizures in 6 hours, two or more seizures in 24 hours, or two to four seizures in less than 48 hours.[64]Jafarpour S, Hirsch LJ, Gaínza-Lein M, et al. Seizure cluster: definition, prevalence, consequences, and management. Seizure. 2019 May;68:9-15. https://www.seizure-journal.com/article/S1059-1311(18)30112-2/fulltext http://www.ncbi.nlm.nih.gov/pubmed/29871784?tool=bestpractice.com
In a hospital setting, intravenous benzodiazepines and intravenous formulations of anticonvulsants such as phenytoin/fosphenytoin, valproic acid, levetiracetam, lacosamide, and brivaracetam can be used. Choice of medication should take into account the age and sex of the patient, and any comorbidities. The patient should be continued on a suitable oral formulation of an anticonvulsant once stabilized.
Pregnant women with epilepsy should be under the care of a multidisciplinary team that includes a high-risk obstetric specialist.[112]Stephen LJ, Harden C, Tomson T, et al. Management of epilepsy in women. Lancet Neurol. 2019 May;18(5):481-91. http://www.ncbi.nlm.nih.gov/pubmed/30857949?tool=bestpractice.com [113]Johansen-Bibby A. Prescribing for pregnancy: epilepsy. Drug Ther Bull. 2020 Jul;58(7):103-6. http://www.ncbi.nlm.nih.gov/pubmed/32503804?tool=bestpractice.com [114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com Choice of anticonvulsant needs to balance the risks of seizures to the health of the woman and fetus against potential teratogenic effects of the drug treatment, and should be guided by specialist advice.[114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com Some anticonvulsants are contraindicated in pregnancy due to an increased risk of major congenital malformations and/or child neurodevelopmental disorders (e.g., valproic acid and its derivatives, topiramate, phenobarbital, phenytoin).[115]Wyszynski DF, Nambisan M, Surve T, et al; Antiepileptic Drug Pregnancy Registry. Increased rate of major malformations in offspring exposed to valproate during pregnancy. Neurology. 2005 Mar 22;64(6):961-5. http://www.ncbi.nlm.nih.gov/pubmed/15781808?tool=bestpractice.com [116]Holmes LB, Wyszynski DF, Lieberman E. The AED (antiepileptic drug) pregnancy registry: a 6-year experience. Arch Neurol. 2004 May;61(5):673-8. https://jamanetwork.com/journals/jamaneurology/fullarticle/785808 http://www.ncbi.nlm.nih.gov/pubmed/15148143?tool=bestpractice.com [117]Meador KJ, Baker GA, Browning N, et al; NEAD Study Group. Cognitive function at 3 years of age after fetal exposure to antiepileptic drugs. N Engl J Med. 2009 Apr 16;360(16):1597-605. http://www.ncbi.nlm.nih.gov/pubmed/19369666?tool=bestpractice.com [118]Medicines and Healthcare products Regulatory Agency. Antiepileptic drugs in pregnancy: updated advice following comprehensive safety review. Jan 2021 [internet publication]. https://www.gov.uk/drug-safety-update/antiepileptic-drugs-in-pregnancy-updated-advice-following-comprehensive-safety-review [120]Bjørk MH, Zoega H, Leinonen MK, et al. Association of prenatal exposure to antiseizure medication with risk of autism and intellectual disability. JAMA Neurol. 2022 Jul 1;79(7):672-81. https://jamanetwork.com/journals/jamaneurology/fullarticle/2793003 http://www.ncbi.nlm.nih.gov/pubmed/35639399?tool=bestpractice.com [123]Dreier JW, Bjørk MH, Alvestad S, et al. Prenatal exposure to antiseizure medication and incidence of childhood- and adolescence-onset psychiatric disorders. JAMA Neurol. 2023 Jun 1;80(6):568-77. http://www.ncbi.nlm.nih.gov/pubmed/37067807?tool=bestpractice.com [124]Bromley R, Adab N, Bluett-Duncan M, et al. Monotherapy treatment of epilepsy in pregnancy: congenital malformation outcomes in the child. Cochrane Database Syst Rev. 2023 Aug 29;8(8):CD010224. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD010224.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/37647086?tool=bestpractice.com [126]Athar F, Ehsan M, Farooq M, et al. Adverse fetal and neonatal outcomes following in-utero exposure to oxcarbazepine: a systematic review and meta-analysis. Br J Clin Pharmacol. 2022 Aug;88(8):3600-9. https://bpspubs.onlinelibrary.wiley.com/doi/10.1111/bcp.15413 http://www.ncbi.nlm.nih.gov/pubmed/35591806?tool=bestpractice.com The latest data on teratogenicity should be consulted.[114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com
Primary options
diazepam: children: consult specialist for guidance on dose; adults: 5-10 mg intravenously every 5-10 minutes according to response, maximum 30 mg/total dose
OR
lorazepam: children: consult specialist for guidance on dose; adults: 4 mg intravenously as a single dose, may repeat once after 10-15 minutes
OR
phenytoin: children: consult specialist for guidance on dose; adults: 15-20 mg/kg intravenously as a loading dose, followed by an additional dose of 5-10 mg/kg according to response, maximum 30 mg/kg/total loading dose
OR
fosphenytoin: children: consult specialist for guidance on dose; adults: 15-20 mg (phenytoin equivalents)/kg intravenously as a loading dose, followed by an additional dose of 5-10 mg (phenytoin equivalents)/kg according to response, maximum 30 (phenytoin equivalents)/kg/total loading dose
More fosphenytoinFosphenytoin dose expressed as phenytoin equivalents.
OR
valproic acid: children: consult specialist for guidance on dose; adults: 20-40 mg/kg intravenously as a single dose, may give an additional dose of 20 mg/kg according to response, maximum 3000 mg/dose
OR
lacosamide: children and adults: consult specialist for guidance on dose
OR
levetiracetam: children and adults: consult specialist for guidance on dose
OR
brivaracetam: children and adults: consult specialist for guidance on dose
adults <60 years old: nonpregnant or no risk of pregnancy
anticonvulsant monotherapy
A trial of anticonvulsant monotherapy is indicated after two spontaneous seizures, or one seizure with one of the following: epileptiform activity on electroencephalogram; structural pathology on brain magnetic resonance imaging or computed tomography; seizure out of sleep; focal onset indicated by semiology (i.e., head turning or gaze deviation).
Anticonvulsant options are listed based on established efficacy and optimal tolerability. However, treatment should always be tailored to the needs of the patient, taking into account age and sex; the underlying etiology of the seizures; the pharmacokinetic properties, mechanism of action, and available formulations of the drugs; and comorbidities and any other medications. Any anticonvulsant, including those not listed here, may be used as first-line monotherapy if it is the most suitable choice for a particular patient.
Lamotrigine, levetiracetam, and oxcarbazepine are suitable first-line anticonvulsants for monotherapy.[74]Koch MW, Polman SK. Oxcarbazepine versus carbamazepine monotherapy for partial onset seizures. Cochrane Database Syst Rev. 2009 Oct 7;(4):CD006453. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD006453.pub2/full http://www.ncbi.nlm.nih.gov/pubmed/19821367?tool=bestpractice.com [75]Brodie MJ, Perucca E, Ryvlin P, et al; Levetiracetam Monotherapy Study Group. Comparison of levetiracetam and controlled-release carbamazepine in newly diagnosed epilepsy. Neurology. 2007 Feb 6;68(6):402-8. http://www.ncbi.nlm.nih.gov/pubmed/17283312?tool=bestpractice.com [76]Kanner AM, Ashman E, Gloss D, et al. Practice guideline update summary: efficacy and tolerability of the new antiepileptic drugs I: treatment of new-onset epilepsy. Report of the American Epilepsy Society and the Guideline Development, Dissemination, and Implementation Subcommittee of the American Academy of Neurology. Epilepsy Curr. 2018 Jul-Aug;18(4):260-8. https://journals.sagepub.com/doi/10.5698/1535-7597.18.4.260 http://www.ncbi.nlm.nih.gov/pubmed/30254527?tool=bestpractice.com [77]Lattanzi S, Zaccara G, Giovannelli F, et al. Antiepileptic monotherapy in newly diagnosed focal epilepsy. A network meta-analysis. Acta Neurol Scand. 2019 Jan;139(1):33-41. http://www.ncbi.nlm.nih.gov/pubmed/30194755?tool=bestpractice.com [78]Nevitt SJ, Tudur Smith C, Weston J, et al. Lamotrigine versus carbamazepine monotherapy for epilepsy: an individual participant data review. Cochrane Database Syst Rev. 2018 Jun 28;(6):CD001031. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001031.pub4/full http://www.ncbi.nlm.nih.gov/pubmed/29952431?tool=bestpractice.com [79]Nevitt SJ, Tudur Smith C, Marson AG. Oxcarbazepine versus phenytoin monotherapy for epilepsy: an individual participant data review. Cochrane Database Syst Rev. 2018 Oct 23;(10):CD003615. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003615.pub4/full http://www.ncbi.nlm.nih.gov/pubmed/30350354?tool=bestpractice.com Results from a pragmatic randomized controlled trial suggest that the adverse reaction profile of lamotrigine may be superior to that of levetiracetam in patients (>5 years of age) with two or more unprovoked seizures.[80]Marson A, Burnside G, Appleton R, et al; SANAD II Collaborators. The SANAD II study of the effectiveness and cost-effectiveness of levetiracetam, zonisamide, or lamotrigine for newly diagnosed focal epilepsy: an open-label, non-inferiority, multicentre, phase 4, randomised controlled trial. Lancet. 2021 Apr 10;397(10282):1363-74. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)00247-6/fulltext http://www.ncbi.nlm.nih.gov/pubmed/33838757?tool=bestpractice.com
Other treatment options include lacosamide, eslicarbazepine, brivaracetam, zonisamide, carbamazepine, valproic acid, topiramate, perampanel, and cenobamate.[77]Lattanzi S, Zaccara G, Giovannelli F, et al. Antiepileptic monotherapy in newly diagnosed focal epilepsy. A network meta-analysis. Acta Neurol Scand. 2019 Jan;139(1):33-41.
http://www.ncbi.nlm.nih.gov/pubmed/30194755?tool=bestpractice.com
[81]Reimers A, Ljung H. An evaluation of zonisamide, including its long-term efficacy, for the treatment of focal epilepsy. Expert Opin Pharmacother. 2019 Jun;20(8):909-15.
https://www.tandfonline.com/doi/full/10.1080/14656566.2019.1595584
http://www.ncbi.nlm.nih.gov/pubmed/30908087?tool=bestpractice.com
[82]Nevitt SJ, Sudell M, Tudur Smith C, et al. Topiramate versus carbamazepine monotherapy for epilepsy: an individual participant data review. Cochrane Database Syst Rev. 2019 Jun 24;(6):CD012065.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012065.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/31233229?tool=bestpractice.com
[ ]
For adults with drug‐resistant focal epilepsy, what are the effects of adjunct eslicarbazepine acetate?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3758/fullShow me the answer Behavioral adverse events are likely to be less frequent and less severe with brivaracetam than with levetiracetam, except in patients with a history of psychiatric comorbidities.[83]Arnold S, Badalamenti V, Diaz A, et al. Conversion to brivaracetam monotherapy for the treatment of patients with focal seizures: two double-blind, randomized, multicenter, historical control, phase III studies. Epilepsy Res. 2018 Mar;141:73-82.
http://www.ncbi.nlm.nih.gov/pubmed/29486396?tool=bestpractice.com
[84]Milovanović JR, Janković SM, Pejčić A, et al. Evaluation of brivaracetam: a new drug to treat epilepsy. Expert Opin Pharmacother. 2017 Sep;18(13):1381-9.
http://www.ncbi.nlm.nih.gov/pubmed/28737479?tool=bestpractice.com
[85]Menzler K, Mross PM, Rosenow F, et al. First clinical postmarketing experiences in the treatment of epilepsies with brivaracetam: a retrospective observational multicentre study. BMJ Open. 2019 Nov 4;9(11):e030746.
https://bmjopen.bmj.com/content/9/11/e030746.long
http://www.ncbi.nlm.nih.gov/pubmed/31690606?tool=bestpractice.com
[86]Feyissa AM. Brivaracetam in the treatment of epilepsy: a review of clinical trial data. Neuropsychiatr Dis Treat. 2019 Sep 9;15:2587-600.
https://www.dovepress.com/brivaracetam-in-the-treatment-of-epilepsy-a-review-of-clinical-trial-d-peer-reviewed-fulltext-article-NDT
http://www.ncbi.nlm.nih.gov/pubmed/31571877?tool=bestpractice.com
Gabapentin and pregabalin are appropriate options for patients with particular comorbidities.
For patients with psychiatric comorbidities: levetiracetam, brivaracetam, topiramate, zonisamide, and perampanel should only be used with great caution and with close monitoring for recurrence or exacerbation of psychiatric symptoms.
For patients with cognitive problems: topiramate and zonisamide should only be used with great caution.
For patients with renal impairment: levetiracetam should be used with caution and on the advice of a specialist neurologist.
For patients who may have underlying liver disease or other comorbidities requiring multiple drug therapy, including P450 enzyme-inducing medication: levetiracetam, gabapentin, and pregabalin may help minimize effects on the liver and reduce the potential for drug-drug interactions. Valproic acid should not be offered (neither should phenobarbital or phenytoin).
For patients with migraine as well as focal seizures: topiramate and valproic acid are both effective as migraine prophylaxis.
For patients with neuropathic pain: anticonvulsants with efficacy for certain neuropathic pain conditions include gabapentin, pregabalin, oxcarbazepine, and carbamazepine.[70]Tassone DM, Boyce E, Guyer J, et al. Pregabalin: a novel gamma-aminobutyric acid analogue in the treatment of neuropathic pain, partial-onset seizures, and anxiety disorders. Clin Ther. 2007 Jan;29(1):26-48.
http://www.ncbi.nlm.nih.gov/pubmed/17379045?tool=bestpractice.com
[71]Delahoy P, Thompson S, Marschner IC. Pregabalin versus gabapentin in partial epilepsy: a meta-analysis of dose-response relationships. BMC Neurol. 2010 Nov 1;10:104.
https://bmcneurol.biomedcentral.com/articles/10.1186/1471-2377-10-104
http://www.ncbi.nlm.nih.gov/pubmed/21040531?tool=bestpractice.com
[72]Panebianco M, Bresnahan R, Marson AG. Pregabalin add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2022 Mar 29;3:CD005612.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD005612.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/35349176?tool=bestpractice.com
[ ]
What are the effects of pregabalin add‐on for people with drug‐resistant focal epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3977/fullShow me the answer
Anticonvulsants associated with weight gain include valproic acid, gabapentin, and pregabalin, and these should be used with great caution in patients with obesity. Those associated with weight loss include topiramate and zonisamide. For the most part, other anticonvulsants are considered not to affect body weight.
Anticonvulsant dose adjustment and/or slower titration may be needed (e.g., for people with renal or hepatic impairment).
Avoiding sleep deprivation, alcohol, and excessive stress may be helpful at any stage of treatment, but cannot substitute for anticonvulsant therapy. There is some evidence that adjunctive psychologic and self‐management interventions can improve quality of life and patient outcomes that are important to people with epilepsy.[143]Michaelis R, Tang V, Nevitt SJ, et al. Psychological treatments for people with epilepsy. Cochrane Database Syst Rev. 2020 Sep 7;(8):CD012081.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012081.pub3/full
[144]Luedke MW, Blalock DV, Goldstein KM, et al. Self-management of epilepsy: a systematic review. Ann Intern Med. 2019 Jul 16;171(2):117-26.
http://www.ncbi.nlm.nih.gov/pubmed/31261386?tool=bestpractice.com
[145]Michaelis R, Tang V, Goldstein LH, et al. Psychological treatments for adults and children with epilepsy: evidence-based recommendations by the International League Against Epilepsy Psychology Task Force. Epilepsia. 2018 Jul;59(7):1282-302.
http://www.ncbi.nlm.nih.gov/pubmed/29917225?tool=bestpractice.com
[ ]
Do psychological treatments improve quality of life for people with epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3367/fullShow me the answer
Primary options
lamotrigine: consult specialist for guidance on dose
OR
levetiracetam: 500 mg orally twice daily initially, increase gradually according to response, maximum 3000 mg/day
OR
oxcarbazepine: 300 mg orally twice daily initially, increase gradually according to response, maximum 2400 mg/day
Secondary options
lacosamide: 100 mg orally twice daily initially, increase gradually according to response, maximum 400 mg/day
OR
eslicarbazepine acetate: 400 mg orally once daily initially, increase gradually according to response, maximum 1600 mg/day
OR
brivaracetam: 50 mg orally twice daily initially, increase gradually according to response, maximum 200 mg/day
Tertiary options
zonisamide: 100 mg orally once daily initially, increase gradually according to response, maximum 400 mg/day
OR
carbamazepine: 200 mg orally (immediate-release) twice daily initially, increase gradually according to response, maximum 1600 mg/day
OR
valproic acid: 10-15 mg/kg/day orally given in 1-3 divided doses initially, increase gradually according to response, maximum 60 mg/kg/day
OR
topiramate: 25 mg orally (immediate-release) twice daily initially, increase gradually according to response, maximum 400 mg/day
OR
perampanel: 2 mg orally once daily at bedtime initially, increase gradually according to response, maximum 12 mg/day
OR
gabapentin: 300 mg orally three times daily initially, increase gradually according to response, maximum 3600 mg/day
OR
pregabalin: 75 mg orally twice daily or 50 mg orally three times daily initially, increase gradually according to response, maximum 600 mg/day
OR
cenobamate: 12.5 mg orally once daily initially, increase gradually according to response, maximum 400 mg/day
alternative anticonvulsant monotherapy
If the initial anticonvulsant is not effective or not tolerated, a second monotherapy trial is indicated, choosing a different anticonvulsant from among the options available. A drug with a different mechanism of action should be considered. Any anticonvulsant, including those not listed for first-line monotherapy above, may be used as second-line monotherapy if it is the most suitable choice for a particular patient.
If the first monotherapy agent is unsuitable due to intolerable adverse effects, the alternative agent should be chosen with special consideration for the patient's health profile and tolerance. Any new information that helps to define the epilepsy syndrome should be used to select the best-suited medication.
When changing from one anticonvulsant to another, current and new medications should be cross-titrated slowly; agents should not be started or stopped abruptly (the concomitant anticonvulsant is gradually reduced as the new agent is introduced). Research the specific pharmacokinetic profiles for each of the drugs before instructing the patient on how to switch. A written schedule helps patient adherence. Dose should be adjusted according to response and serum drug level.
Advise patients that there is an increased risk of seizures during this transition period.
anticonvulsant dual therapy
If two separate monotherapy trials at optimal doses do not result in seizure control, a dual therapy trial may be initiated using a combination of two anticonvulsants with different mechanisms of action (with the aim of maximizing efficacy and minimizing toxicity), or a combination of two drugs that have been shown to have anticonvulsant agonistic effects (such as valproic acid plus lamotrigine). These may be a combination of two monotherapy options, or an anticonvulsant that is used primarily as an adjunctive treatment (e.g., clobazam) in combination with one of the monotherapy options.[72]Panebianco M, Bresnahan R, Marson AG. Pregabalin add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2022 Mar 29;3:CD005612.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD005612.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/35349176?tool=bestpractice.com
[89]Li-Na Z, Deng C, Hai-Jiao W, et al. Indirect comparison of third-generation antiepileptic drugs as adjunctive treatment for uncontrolled focal epilepsy. Epilepsy Res. 2018 Jan;139:60-72.
http://www.ncbi.nlm.nih.gov/pubmed/29197667?tool=bestpractice.com
[90]Brigo F, Lattanzi S, Igwe SC, et al. Zonisamide add-on therapy for focal epilepsy. Cochrane Database Syst Rev. 2020 Jul 24;(7):CD001416.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001416.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/32715463?tool=bestpractice.com
[91]Bresnahan R, Panebianco M, Marson AG. Brivaracetam add-on therapy for drug-resistant epilepsy. Cochrane Database Syst Rev. 2022 Mar 14;3:CD011501.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD011501.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/35285519?tool=bestpractice.com
[92]Bresnahan R, Hounsome J, Jette N, et al. Topiramate add-on therapy for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2019 Oct 23;(10):CD001417.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001417.pub4/full
http://www.ncbi.nlm.nih.gov/pubmed/31642054?tool=bestpractice.com
[93]Panebianco M, Bresnahan R, Ramaratnam S, et al. Lamotrigine add-on therapy for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Mar 20;(3):CD001909.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001909.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/32196639?tool=bestpractice.com
[94]Bresnahan R, Martin-McGill KJ, Williamson J, et al. Clobazam add-on therapy for drug-resistant epilepsy. Cochrane Database Syst Rev. 2019 Oct 22;(10):CD004154.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD004154.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/31638272?tool=bestpractice.com
[95]Potschka H, Trinka E. Perampanel: does it have broad-spectrum potential? Epilepsia. 2019 Mar;60 (suppl 1):22-36.
https://onlinelibrary.wiley.com/doi/full/10.1111/epi.14456
http://www.ncbi.nlm.nih.gov/pubmed/29953584?tool=bestpractice.com
[96]Panebianco M, Al-Bachari S, Hutton JL, et al. Gabapentin add-on treatment for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2021 Jan 12;(1):CD001415.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001415.pub4/full
http://www.ncbi.nlm.nih.gov/pubmed/33434292?tool=bestpractice.com
[97]Bresnahan R, Atim-Oluk M, Marson AG. Oxcarbazepine add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Mar 4;(3):CD012433.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012433.pub2/full
http://www.ncbi.nlm.nih.gov/pubmed/32129501?tool=bestpractice.com
[98]Mbizvo GK, Chandrasekar B, Nevitt SJ, et al. Levetiracetam add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Jun 30;(6):CD001901.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001901.pub3/full
[99]Babar RK, Bresnahan R, Gillespie CS, et al. Lacosamide add-on therapy for focal epilepsy. Cochrane Database Syst Rev. 2021 May 17;(5):CD008841.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD008841.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/33998660?tool=bestpractice.com
[100]Chang XC, Yuan H, Wang Y, et al. Eslicarbazepine acetate add-on therapy for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2021 Jun 22;(6):CD008907.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD008907.pub4/full
http://www.ncbi.nlm.nih.gov/pubmed/34155624?tool=bestpractice.com
[101]Krauss GL, Klein P, Brandt C, et al. Safety and efficacy of adjunctive cenobamate (YKP3089) in patients with uncontrolled focal seizures: a multicentre, double-blind, randomised, placebo-controlled, dose-response trial. Lancet Neurol. 2020 Jan;19(1):38-48.
http://www.ncbi.nlm.nih.gov/pubmed/31734103?tool=bestpractice.com
[102]Sperling MR, Abou-Khalil B, Aboumatar S, et al. Efficacy of cenobamate for uncontrolled focal seizures: post hoc analysis of a phase 3, multicenter, open-label study. Epilepsia. 2021 Dec;62(12):3005-15.
https://onlinelibrary.wiley.com/doi/10.1111/epi.17091
http://www.ncbi.nlm.nih.gov/pubmed/34633084?tool=bestpractice.com
[103]Kanner AM, Ashman E, Gloss D, et al. Practice guideline update summary: efficacy and tolerability of the new antiepileptic drugs II: treatment-resistant epilepsy. Report of the American Epilepsy Society and the Guideline Development, Dissemination, and Implementation Subcommittee of the American Academy of Neurology. Epilepsy Curr. 2018 Jul-Aug;18(4):269-78.
https://journals.sagepub.com/doi/10.5698/1535-7597.18.4.269
http://www.ncbi.nlm.nih.gov/pubmed/30254528?tool=bestpractice.com
[ ]
What are the benefits and harms of lamotrigine add-on in adults or children with drug-resistant partial epilepsy?/cca.html?targetUrl=https://cochranelibrary.com/cca/doi/10.1002/cca.1474/fullShow me the answer
Other adjunctive therapies are available, including rufinamide, vigabatrin, tiagabine, and felbamate.[104]Bresnahan R, Gianatsi M, Maguire MJ, et al. Vigabatrin add-on therapy for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Jul 30;(7):CD007302.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD007302.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/32730657?tool=bestpractice.com
[105]Panebianco M, Prabhakar H, Marson AG. Rufinamide add-on therapy for drug-resistant epilepsy. Cochrane Database Syst Rev. 2020 Nov 8;(11):CD011772.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD011772.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/33179247?tool=bestpractice.com
[106]Bresnahan R, Martin-McGill KJ, Hutton JL, et al. Tiagabine add-on therapy for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2019 Oct 14;(10):CD001908.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001908.pub4/full
http://www.ncbi.nlm.nih.gov/pubmed/31608990?tool=bestpractice.com
[107]Shi LL, Bresnahan R, Martin-McGill KJ, et al. Felbamate add-on therapy for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2019 Aug 1;(8):CD008295.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD008295.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/31425617?tool=bestpractice.com
[108]Slater J, Chung S, Huynh L, et al. Efficacy of antiepileptic drugs in the adjunctive treatment of refractory partial-onset seizures: meta-analysis of pivotal trials. Epilepsy Res. 2018 Jul;143:120-9.
https://www.sciencedirect.com/science/article/pii/S0920121117301766
http://www.ncbi.nlm.nih.gov/pubmed/29784458?tool=bestpractice.com
[ ]
What are the effects of rufinamide as an adjunct to conventional antiepileptic drug (AED) therapy for people with refractory epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3489/fullShow me the answer
[
]
What are the effects of tiagabine add‐on therapy for people with drug‐resistant focal epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.2889/fullShow me the answer However, rufinamide, vigabatrin, tiagabine, and felbamate are associated with severe adverse effects, and should only be considered when multiple other medications have been attempted and surgery is deemed not to be an option. An epilepsy specialist should be involved if these agents are being considered. These drugs are not detailed above.
A dose adjustment may be required when using two anticonvulsants together; consult a specialist for guidance on dose.
A list of suitable anticonvulsants for this patient group is detailed here; however, this list is not exhaustive. Two anticonvulsants may be chosen from this list.
Primary options
lamotrigine: consult specialist for guidance on dose
OR
oxcarbazepine: 300 mg orally twice daily initially, increase gradually according to response, maximum 2400 mg/day
OR
levetiracetam: 500 mg orally twice daily initially, increase gradually according to response, maximum 3000 mg/day
OR
brivaracetam: 50 mg orally twice daily initially, increase gradually according to response, maximum 200 mg/day
OR
valproic acid: 10-15 mg/kg/day orally given in 1-3 divided doses initially, increase gradually according to response, maximum 60 mg/kg/day
OR
perampanel: 2 mg orally once daily at bedtime initially, increase gradually according to response, maximum 12 mg/day
OR
clobazam: consult specialist for guidance on dose
OR
gabapentin: 300 mg orally three times daily initially, increase gradually according to response, maximum 3600 mg/day
OR
topiramate: 25 mg orally (immediate-release) twice daily initially, increase gradually according to response, maximum 400 mg/day
OR
zonisamide: 100 mg orally once daily initially, increase gradually according to response, maximum 400 mg/day
OR
pregabalin: 75 mg orally twice daily or 50 mg orally three times daily initially, increase gradually according to response, maximum 600 mg/day
OR
lacosamide: 100 mg orally twice daily initially, increase gradually according to response, maximum 400 mg/day
OR
eslicarbazepine acetate: 400 mg orally once daily initially, increase gradually according to response, maximum 1600 mg/day
OR
carbamazepine: 200 mg orally (immediate-release) twice daily initially, increase gradually according to response, maximum 1600 mg/day
OR
cenobamate: 12.5 mg orally once daily initially, increase gradually according to response, maximum 400 mg/day
OR
phenytoin: 15-20 mg/kg orally as a loading dose given in 3 divided doses every 2-4 hours, followed by 4-7 mg/kg/day (or 300-400 mg/day) given in 2-3 divided doses
OR
phenobarbital: 60 mg orally two to three times daily
OR
primidone: 100-125 mg orally once daily at bedtime for 3 days, increase gradually according to response, maximum 2000 mg/day
resective epilepsy surgery or neurostimulation or ketogenic diet
Failure of at least two anticonvulsant drugs in combination (treatment-resistant or intractable epilepsy) should result in reassessment of the diagnosis. If the diagnosis is not secure, then reinvestigation, possibly with video/electroencephalogram (EEG) monitoring, may be helpful.
If the focal seizure diagnosis is correct, and the patient is truly refractory to anticonvulsants, consider and perform workup for epilepsy surgery or neurostimulation.
Consideration of these advanced options should be pursued at an epilepsy specialty center only.
Candidates for epilepsy surgery include patients with lesions on brain magnetic resonance imaging or in whom the epileptogenic area can be localized to one region by a variety of techniques, including EEG. Minimally invasive alternatives to traditional resective surgery include laser interstitial thermal therapy (LITT), radiofrequency ablation, and stereotactic radiosurgery.[149]Kohlhase K, Zöllner JP, Tandon N, et al. Comparison of minimally invasive and traditional surgical approaches for refractory mesial temporal lobe epilepsy: a systematic review and meta-analysis of outcomes. Epilepsia. 2021 Apr;62(4):831-45. https://onlinelibrary.wiley.com/doi/10.1111/epi.16846 http://www.ncbi.nlm.nih.gov/pubmed/33656182?tool=bestpractice.com [150]Grewal SS, Alvi MA, Lu VM, et al. Magnetic resonance-guided laser interstitial thermal therapy versus stereotactic radiosurgery for medically intractable temporal lobe epilepsy: a systematic review and meta-analysis of seizure outcomes and complications. World Neurosurg. 2019 Feb;122:e32-47. http://www.ncbi.nlm.nih.gov/pubmed/30244184?tool=bestpractice.com
If the patient has more than one epileptogenic focus, neurostimulation may be considered an alternative to surgery.[151]Boon P, De Cock E, Mertens A, et al. Neurostimulation for drug-resistant epilepsy: a systematic review of clinical evidence for efficacy, safety, contraindications and predictors for response. Curr Opin Neurol. 2018 Apr;31(2):198-210. http://www.ncbi.nlm.nih.gov/pubmed/29493559?tool=bestpractice.com Options include vagus nerve stimulation and deep brain stimulation.[152]Panebianco M, Rigby A, Weston J, et al. Vagus nerve stimulation for partial seizures. Cochrane Database Syst Rev. 2015 Apr 3;(4):CD002896. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD002896.pub2/full http://www.ncbi.nlm.nih.gov/pubmed/25835947?tool=bestpractice.com [153]Wang HJ, Tan G, Zhu LN, et al. Predictors of seizure reduction outcome after vagus nerve stimulation in drug-resistant epilepsy. Seizure. 2019 Mar;66:53-60. https://www.seizure-journal.com/article/S1059-1311(18)30760-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/30802843?tool=bestpractice.com [154]Li MCH, Cook MJ. Deep brain stimulation for drug-resistant epilepsy. Epilepsia. 2018 Feb;59(2):273-90. https://onlinelibrary.wiley.com/doi/full/10.1111/epi.13964 http://www.ncbi.nlm.nih.gov/pubmed/29218702?tool=bestpractice.com [155]Toffa DH, Touma L, El Meskine T, et al. Learnings from 30 years of reported efficacy and safety of vagus nerve stimulation (VNS) for epilepsy treatment: a critical review. Seizure. 2020 Dec;83:104-23. https://www.seizure-journal.com/article/S1059-1311(20)30309-5/fulltext http://www.ncbi.nlm.nih.gov/pubmed/33120323?tool=bestpractice.com Responsive neurostimulation (RNS) therapy may be appropriate for some medically refractory patients for whom resective surgery is not a viable option.[157]US Food and Drug Administration. RNS® System - P100026. Jan 2015 [internet publication]. http://wayback.archive-it.org/7993/20170112091430/http://www.fda.gov/MedicalDevices/ProductsandMedicalProcedures/DeviceApprovalsandClearances/Recently-ApprovedDevices/ucm376685.htm [158]Bergey GK, Morrell MJ, Mizrahi EM, et al. Long-term treatment with responsive brain stimulation in adults with refractory partial seizures. Neurology. 2015 Feb 24;84(8):810-7. https://n.neurology.org/content/84/8/810 http://www.ncbi.nlm.nih.gov/pubmed/25616485?tool=bestpractice.com [159]Heck CN, King-Stephens D, Massey AD, et al. Two-year seizure reduction in adults with medically intractable partial onset epilepsy treated with responsive neurostimulation: final results of the RNS System Pivotal trial. Epilepsia. 2014 Mar;55(3):432-41. https://onlinelibrary.wiley.com/doi/full/10.1111/epi.12534 http://www.ncbi.nlm.nih.gov/pubmed/24621228?tool=bestpractice.com [160]Morrell MJ; RNS System in Epilepsy Study Group. Responsive cortical stimulation for the treatment of medically intractable partial epilepsy. Neurology. 2011 Sep 27;77(13):1295-304. http://www.ncbi.nlm.nih.gov/pubmed/21917777?tool=bestpractice.com
The ketogenic diet is high in fat and low in carbohydrates, and has been shown to reduce seizure frequency.[161]Freeman JM, Kossoff EH, Freeman JB, et al. The ketogenic diet: a treatment for children and others with epilepsy. New York, NY: Demos Medical Publishing; 2006.[162]Martin-McGill KJ, Jackson CF, Bresnahan R, et al. Ketogenic diets for drug-resistant epilepsy. Cochrane Database Syst Rev. 2020 Jun 24;6(6):CD001903.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001903.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/32588435?tool=bestpractice.com
[163]Zhang Y, Xu J, Zhang K, et al. The anticonvulsant effects of ketogenic diet on epileptic seizures and potential mechanisms. Curr Neuropharmacol. 2018;16(1):66-70.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5771386
http://www.ncbi.nlm.nih.gov/pubmed/28521671?tool=bestpractice.com
[ ]
For people with drug‐resistant epilepsy, how do different ketogenic diets compare?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3256/fullShow me the answer
[
]
What are the effects of a ketogenic diet for people with drug‐resistant epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3229/fullShow me the answer The diet must be initiated in the hospital, under close medical supervision, with monitoring for metabolic acidosis and renal calculi.
adults ≥60 years old
anticonvulsant monotherapy
The decision to treat focal seizures in older people is often made after the first unprovoked seizure, because the likelihood of recurrence is higher, and the consequences of even a single seizure (falls/hip fracture) may be life changing.
Anticonvulsant options are listed based on established efficacy and optimal tolerability. However, treatment should always be tailored to the needs of the patient, taking into account age and sex; the underlying etiology of the seizures; the pharmacokinetic properties, mechanism of action, and available formulations of drug; and comorbidities and any other medications. Any anticonvulsant, including those not listed here, may be used as first-line monotherapy if it is the most suitable choice for a particular patient.
Older patients are particularly susceptible to adverse effects and often have tolerability issues, especially at higher doses or with polytherapy.
Monotherapy at the lowest possible dose is preferred. Doses should be increased gradually according to patient response, and the patient should be closely monitored for signs of toxicity.
The properties of some anticonvulsants make them less desirable choices for treating focal seizures in older people. These anticonvulsants include drugs that are P450 enzyme inducers or inhibitors; have high protein binding; or are associated with cognitive adverse events.
Anticonvulsants with favorable pharmacokinetics and adverse-effect profiles, such as lamotrigine, gabapentin, and levetiracetam, are usually the most appropriate choice for patients ages 60 years or over. Other options include oxcarbazepine, lacosamide, eslicarbazepine, brivaracetam, pregabalin, carbamazepine, zonisamide, valproic acid, perampanel, and cenobamate.
[ ]
For adults with drug‐resistant focal epilepsy, what are the effects of adjunct eslicarbazepine acetate?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3758/fullShow me the answer Treatment should always be tailored to the individual patient.[109]Glauser T, Ben-Menachem E, Bourgeois B, et al; ILAE Subcommission on AED Guidelines. Updated ILAE evidence review of antiepileptic drug efficacy and effectiveness as initial monotherapy for epileptic seizures and syndromes. Epilepsia. 2013 Mar;54(3):551-63.
https://onlinelibrary.wiley.com/doi/full/10.1111/epi.12074
http://www.ncbi.nlm.nih.gov/pubmed/23350722?tool=bestpractice.com
[110]Lattanzi S, Trinka E, Del Giovane C, et al. Antiepileptic drug monotherapy for epilepsy in the elderly: a systematic review and network meta-analysis. Epilepsia. 2019 Nov;60(11):2245-54.
http://www.ncbi.nlm.nih.gov/pubmed/31608438?tool=bestpractice.com
[111]Lezaic N, Gore G, Josephson CB, et al. The medical treatment of epilepsy in the elderly: a systematic review and meta-analysis. Epilepsia. 2019 Jul;60(7):1325-40.
http://www.ncbi.nlm.nih.gov/pubmed/31185130?tool=bestpractice.com
For patients with psychiatric comorbidities: levetiracetam, brivaracetam, zonisamide, and perampanel (as well as topiramate) should only be used with great caution and with close monitoring for recurrence or exacerbation of psychiatric symptoms.
For patients with cognitive problems: zonisamide (and topiramate) should only be used with great caution.
For patients with renal impairment: levetiracetam should be used with caution and on the advice of a specialist neurologist.
For patients who may have underlying liver disease or other comorbidities requiring multiple drug therapy, including P450 enzyme-inducing medication: levetiracetam, gabapentin, and pregabalin may help minimize effects on the liver and reduce the potential for drug-drug interactions. Valproic acid (and phenobarbital, phenytoin, and felbamate) should not be offered.
For patients with migraine as well as focal seizures: valproic acid is effective as migraine prophylaxis (as is topiramate).
For patients with neuropathic pain: anticonvulsants with efficacy for certain neuropathic pain conditions include gabapentin, pregabalin, oxcarbazepine, and carbamazepine.[70]Tassone DM, Boyce E, Guyer J, et al. Pregabalin: a novel gamma-aminobutyric acid analogue in the treatment of neuropathic pain, partial-onset seizures, and anxiety disorders. Clin Ther. 2007 Jan;29(1):26-48.
http://www.ncbi.nlm.nih.gov/pubmed/17379045?tool=bestpractice.com
[71]Delahoy P, Thompson S, Marschner IC. Pregabalin versus gabapentin in partial epilepsy: a meta-analysis of dose-response relationships. BMC Neurol. 2010 Nov 1;10:104.
https://bmcneurol.biomedcentral.com/articles/10.1186/1471-2377-10-104
http://www.ncbi.nlm.nih.gov/pubmed/21040531?tool=bestpractice.com
[72]Panebianco M, Bresnahan R, Marson AG. Pregabalin add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2022 Mar 29;3:CD005612.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD005612.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/35349176?tool=bestpractice.com
[ ]
What are the effects of pregabalin add‐on for people with drug‐resistant focal epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3977/fullShow me the answer
Anticonvulsants associated with weight gain include valproic acid, gabapentin, and pregabalin, and these should be used with great caution in patients with obesity. Zonisamide is associated with weight loss (as is topiramate). For the most part, other anticonvulsants are considered not to affect body weight.
Avoiding sleep deprivation, alcohol, and excessive stress may be helpful at any stage of treatment, but cannot substitute for anticonvulsant drug therapy. There is some evidence that adjunctive psychologic and self‐management interventions can improve quality of life and patient outcomes that are important to people with epilepsy.[143]Michaelis R, Tang V, Nevitt SJ, et al. Psychological treatments for people with epilepsy. Cochrane Database Syst Rev. 2020 Sep 7;(8):CD012081.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012081.pub3/full
[144]Luedke MW, Blalock DV, Goldstein KM, et al. Self-management of epilepsy: a systematic review. Ann Intern Med. 2019 Jul 16;171(2):117-26.
http://www.ncbi.nlm.nih.gov/pubmed/31261386?tool=bestpractice.com
[145]Michaelis R, Tang V, Goldstein LH, et al. Psychological treatments for adults and children with epilepsy: evidence-based recommendations by the International League Against Epilepsy Psychology Task Force. Epilepsia. 2018 Jul;59(7):1282-302.
http://www.ncbi.nlm.nih.gov/pubmed/29917225?tool=bestpractice.com
[ ]
Do psychological treatments improve quality of life for people with epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3367/fullShow me the answer
Primary options
lamotrigine: consult specialist for guidance on dose
OR
gabapentin: 300 mg orally three times daily initially, increase gradually according to response, maximum 3600 mg/day
OR
levetiracetam: 500 mg orally twice daily initially, increase gradually according to response, maximum 3000 mg/day
Secondary options
oxcarbazepine: 300 mg orally twice daily initially, increase gradually according to response, maximum 2400 mg/day
OR
lacosamide: 100 mg orally twice daily initially, increase gradually according to response, maximum 400 mg/day
OR
eslicarbazepine acetate: 400 mg orally once daily initially, increase gradually according to response, maximum 1600 mg/day
OR
brivaracetam: 50 mg orally twice daily initially, increase gradually according to response, maximum 200 mg/day
Tertiary options
pregabalin: 75 mg orally twice daily or 50 mg orally three times daily initially, increase gradually according to response, maximum 600 mg/day
OR
carbamazepine: 200 mg orally (immediate-release) twice daily initially, increase gradually according to response, maximum 1600 mg/day
OR
zonisamide: 100 mg orally once daily initially, increase gradually according to response, maximum 400 mg/day
OR
valproic acid: 10-15 mg/kg/day orally given in 1-3 divided doses initially, increase gradually according to response, maximum 60 mg/kg/day
OR
perampanel: 2 mg orally once daily at bedtime initially, increase gradually according to response, maximum 12 mg/day
OR
cenobamate: 12.5 mg orally once daily initially, increase gradually according to response, maximum 400 mg/day
alternative anticonvulsant monotherapy
If the initial anticonvulsant is not effective or not tolerated, a second monotherapy trial is indicated, choosing a different drug that has proven efficacy for focal epilepsy in the older population. A drug with a different mechanism of action should be considered.
Any anticonvulsant, including those not listed for first-line monotherapy above, may be used as second-line monotherapy if it is the most suitable choice for a particular patient.
If the first monotherapy agent is unsuitable due to intolerable adverse effects (which can be a particular issue in older patients), an alternative agent should be chosen with special consideration for the patient's health profile and tolerance. Any new information that helps to define the epilepsy syndrome should be used to select the best-suited medication.
Start treatment at the lowest possible dose, and increase dose gradually according to patient response. Monitor the patient closely for signs of toxicity.
When changing from one anticonvulsant to another, the current and new medications should be cross-titrated slowly; agents should not be started or stopped abruptly (the concomitant anticonvulsant is gradually reduced as the new agent is introduced). Research the specific pharmacokinetic profiles for each of the drugs before instructing the patient on how to switch. A written schedule helps patient adherence. Dose should be adjusted according to response and serum drug level. Advise patients that there is an increased risk of seizures during this transition period.
anticonvulsant dual therapy
If two separate monotherapy trials at optimal doses do not result in adequate seizure control, a dual therapy trial may be initiated after consultation with a specialist neurologist.
Use a combination of two anticonvulsants with different mechanisms of action (with the aim of maximizing efficacy and minimizing toxicity), or a combination of two drugs that have been shown to have anticonvulsant agonistic effects.[72]Panebianco M, Bresnahan R, Marson AG. Pregabalin add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2022 Mar 29;3:CD005612.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD005612.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/35349176?tool=bestpractice.com
[89]Li-Na Z, Deng C, Hai-Jiao W, et al. Indirect comparison of third-generation antiepileptic drugs as adjunctive treatment for uncontrolled focal epilepsy. Epilepsy Res. 2018 Jan;139:60-72.
http://www.ncbi.nlm.nih.gov/pubmed/29197667?tool=bestpractice.com
[90]Brigo F, Lattanzi S, Igwe SC, et al. Zonisamide add-on therapy for focal epilepsy. Cochrane Database Syst Rev. 2020 Jul 24;(7):CD001416.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001416.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/32715463?tool=bestpractice.com
[91]Bresnahan R, Panebianco M, Marson AG. Brivaracetam add-on therapy for drug-resistant epilepsy. Cochrane Database Syst Rev. 2022 Mar 14;3:CD011501.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD011501.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/35285519?tool=bestpractice.com
[93]Panebianco M, Bresnahan R, Ramaratnam S, et al. Lamotrigine add-on therapy for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Mar 20;(3):CD001909.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001909.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/32196639?tool=bestpractice.com
[95]Potschka H, Trinka E. Perampanel: does it have broad-spectrum potential? Epilepsia. 2019 Mar;60 (suppl 1):22-36.
https://onlinelibrary.wiley.com/doi/full/10.1111/epi.14456
http://www.ncbi.nlm.nih.gov/pubmed/29953584?tool=bestpractice.com
[96]Panebianco M, Al-Bachari S, Hutton JL, et al. Gabapentin add-on treatment for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2021 Jan 12;(1):CD001415.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001415.pub4/full
http://www.ncbi.nlm.nih.gov/pubmed/33434292?tool=bestpractice.com
[97]Bresnahan R, Atim-Oluk M, Marson AG. Oxcarbazepine add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Mar 4;(3):CD012433.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012433.pub2/full
http://www.ncbi.nlm.nih.gov/pubmed/32129501?tool=bestpractice.com
[98]Mbizvo GK, Chandrasekar B, Nevitt SJ, et al. Levetiracetam add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Jun 30;(6):CD001901.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001901.pub3/full
[99]Babar RK, Bresnahan R, Gillespie CS, et al. Lacosamide add-on therapy for focal epilepsy. Cochrane Database Syst Rev. 2021 May 17;(5):CD008841.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD008841.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/33998660?tool=bestpractice.com
[102]Sperling MR, Abou-Khalil B, Aboumatar S, et al. Efficacy of cenobamate for uncontrolled focal seizures: post hoc analysis of a phase 3, multicenter, open-label study. Epilepsia. 2021 Dec;62(12):3005-15.
https://onlinelibrary.wiley.com/doi/10.1111/epi.17091
http://www.ncbi.nlm.nih.gov/pubmed/34633084?tool=bestpractice.com
[103]Kanner AM, Ashman E, Gloss D, et al. Practice guideline update summary: efficacy and tolerability of the new antiepileptic drugs II: treatment-resistant epilepsy. Report of the American Epilepsy Society and the Guideline Development, Dissemination, and Implementation Subcommittee of the American Academy of Neurology. Epilepsy Curr. 2018 Jul-Aug;18(4):269-78.
https://journals.sagepub.com/doi/10.5698/1535-7597.18.4.269
http://www.ncbi.nlm.nih.gov/pubmed/30254528?tool=bestpractice.com
[105]Panebianco M, Prabhakar H, Marson AG. Rufinamide add-on therapy for drug-resistant epilepsy. Cochrane Database Syst Rev. 2020 Nov 8;(11):CD011772.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD011772.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/33179247?tool=bestpractice.com
[ ]
What are the benefits and harms of lamotrigine add-on in adults or children with drug-resistant partial epilepsy?/cca.html?targetUrl=https://cochranelibrary.com/cca/doi/10.1002/cca.1474/fullShow me the answer
Anticonvulsants listed for monotherapy above are also the most suitable options for dual therapy in this population; however, any anticonvulsants may be used in combination if that is the most suitable choice for a particular patient.
A dose adjustment may be required when using two anticonvulsants together; consult a specialist for guidance on dose.
resective epilepsy surgery or neurostimulation
Failure of at least two anticonvulsant drugs in combination should result in reassessment of the diagnosis. If the diagnosis is not secure, then reinvestigation, possibly with video/electroencephalogram (EEG) monitoring, may be helpful.
If the focal seizure diagnosis is correct, and the patient is truly refractory to anticonvulsants, consider and perform workup for epilepsy surgery or neurostimulation.
Consideration of these advanced options should be pursued at an epilepsy specialty center only.
Candidates for epilepsy surgery include patients with lesions on brain magnetic resonance imaging or patients in whom the epileptogenic area can be localized to one region by a variety of techniques, including EEG. Minimally invasive alternatives to traditional resective surgery include laser interstitial thermal therapy (LITT), radiofrequency ablation, and stereotactic radiosurgery.[149]Kohlhase K, Zöllner JP, Tandon N, et al. Comparison of minimally invasive and traditional surgical approaches for refractory mesial temporal lobe epilepsy: a systematic review and meta-analysis of outcomes. Epilepsia. 2021 Apr;62(4):831-45. https://onlinelibrary.wiley.com/doi/10.1111/epi.16846 http://www.ncbi.nlm.nih.gov/pubmed/33656182?tool=bestpractice.com [150]Grewal SS, Alvi MA, Lu VM, et al. Magnetic resonance-guided laser interstitial thermal therapy versus stereotactic radiosurgery for medically intractable temporal lobe epilepsy: a systematic review and meta-analysis of seizure outcomes and complications. World Neurosurg. 2019 Feb;122:e32-47. http://www.ncbi.nlm.nih.gov/pubmed/30244184?tool=bestpractice.com
If the patient has more than one epileptogenic focus, neurostimulation may be considered as an alternative to surgery. Options include vagus nerve stimulation and deep brain stimulation.[152]Panebianco M, Rigby A, Weston J, et al. Vagus nerve stimulation for partial seizures. Cochrane Database Syst Rev. 2015 Apr 3;(4):CD002896. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD002896.pub2/full http://www.ncbi.nlm.nih.gov/pubmed/25835947?tool=bestpractice.com [153]Wang HJ, Tan G, Zhu LN, et al. Predictors of seizure reduction outcome after vagus nerve stimulation in drug-resistant epilepsy. Seizure. 2019 Mar;66:53-60. https://www.seizure-journal.com/article/S1059-1311(18)30760-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/30802843?tool=bestpractice.com [154]Li MCH, Cook MJ. Deep brain stimulation for drug-resistant epilepsy. Epilepsia. 2018 Feb;59(2):273-90. https://onlinelibrary.wiley.com/doi/full/10.1111/epi.13964 http://www.ncbi.nlm.nih.gov/pubmed/29218702?tool=bestpractice.com [155]Toffa DH, Touma L, El Meskine T, et al. Learnings from 30 years of reported efficacy and safety of vagus nerve stimulation (VNS) for epilepsy treatment: a critical review. Seizure. 2020 Dec;83:104-23. https://www.seizure-journal.com/article/S1059-1311(20)30309-5/fulltext http://www.ncbi.nlm.nih.gov/pubmed/33120323?tool=bestpractice.com Responsive neurostimulation (RNS) therapy may be appropriate for some medically refractory patients for whom resective surgery is not a viable option.[157]US Food and Drug Administration. RNS® System - P100026. Jan 2015 [internet publication]. http://wayback.archive-it.org/7993/20170112091430/http://www.fda.gov/MedicalDevices/ProductsandMedicalProcedures/DeviceApprovalsandClearances/Recently-ApprovedDevices/ucm376685.htm [158]Bergey GK, Morrell MJ, Mizrahi EM, et al. Long-term treatment with responsive brain stimulation in adults with refractory partial seizures. Neurology. 2015 Feb 24;84(8):810-7. https://n.neurology.org/content/84/8/810 http://www.ncbi.nlm.nih.gov/pubmed/25616485?tool=bestpractice.com [159]Heck CN, King-Stephens D, Massey AD, et al. Two-year seizure reduction in adults with medically intractable partial onset epilepsy treated with responsive neurostimulation: final results of the RNS System Pivotal trial. Epilepsia. 2014 Mar;55(3):432-41. https://onlinelibrary.wiley.com/doi/full/10.1111/epi.12534 http://www.ncbi.nlm.nih.gov/pubmed/24621228?tool=bestpractice.com [160]Morrell MJ; RNS System in Epilepsy Study Group. Responsive cortical stimulation for the treatment of medically intractable partial epilepsy. Neurology. 2011 Sep 27;77(13):1295-304. http://www.ncbi.nlm.nih.gov/pubmed/21917777?tool=bestpractice.com
women of childbearing potential
anticonvulsant monotherapy
Care should be taken with anticonvulsant treatment for any woman of childbearing potential. Women with epilepsy should receive preconception counseling.[112]Stephen LJ, Harden C, Tomson T, et al. Management of epilepsy in women. Lancet Neurol. 2019 May;18(5):481-91. http://www.ncbi.nlm.nih.gov/pubmed/30857949?tool=bestpractice.com [113]Johansen-Bibby A. Prescribing for pregnancy: epilepsy. Drug Ther Bull. 2020 Jul;58(7):103-6. http://www.ncbi.nlm.nih.gov/pubmed/32503804?tool=bestpractice.com [114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com
The choice of anticonvulsant should be based upon the likelihood of pregnancy in the near future. The latest data available on teratogenicity should be consulted.[114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com Data on the teratogenic potential of newer anticonvulsants may not be available or may be limited.[118]Medicines and Healthcare products Regulatory Agency. Antiepileptic drugs in pregnancy: updated advice following comprehensive safety review. Jan 2021 [internet publication]. https://www.gov.uk/drug-safety-update/antiepileptic-drugs-in-pregnancy-updated-advice-following-comprehensive-safety-review
Some anticonvulsants are contraindicated in pregnancy due to an increased risk of major congenital malformations and/or child neurodevelopmental disorders (e.g., valproic acid and its derivatives, topiramate, phenobarbital,phenytoin).[115]Wyszynski DF, Nambisan M, Surve T, et al; Antiepileptic Drug Pregnancy Registry. Increased rate of major malformations in offspring exposed to valproate during pregnancy. Neurology. 2005 Mar 22;64(6):961-5. http://www.ncbi.nlm.nih.gov/pubmed/15781808?tool=bestpractice.com [116]Holmes LB, Wyszynski DF, Lieberman E. The AED (antiepileptic drug) pregnancy registry: a 6-year experience. Arch Neurol. 2004 May;61(5):673-8. https://jamanetwork.com/journals/jamaneurology/fullarticle/785808 http://www.ncbi.nlm.nih.gov/pubmed/15148143?tool=bestpractice.com [117]Meador KJ, Baker GA, Browning N, et al; NEAD Study Group. Cognitive function at 3 years of age after fetal exposure to antiepileptic drugs. N Engl J Med. 2009 Apr 16;360(16):1597-605. http://www.ncbi.nlm.nih.gov/pubmed/19369666?tool=bestpractice.com [118]Medicines and Healthcare products Regulatory Agency. Antiepileptic drugs in pregnancy: updated advice following comprehensive safety review. Jan 2021 [internet publication]. https://www.gov.uk/drug-safety-update/antiepileptic-drugs-in-pregnancy-updated-advice-following-comprehensive-safety-review [120]Bjørk MH, Zoega H, Leinonen MK, et al. Association of prenatal exposure to antiseizure medication with risk of autism and intellectual disability. JAMA Neurol. 2022 Jul 1;79(7):672-81. https://jamanetwork.com/journals/jamaneurology/fullarticle/2793003 http://www.ncbi.nlm.nih.gov/pubmed/35639399?tool=bestpractice.com [123]Dreier JW, Bjørk MH, Alvestad S, et al. Prenatal exposure to antiseizure medication and incidence of childhood- and adolescence-onset psychiatric disorders. JAMA Neurol. 2023 Jun 1;80(6):568-77. http://www.ncbi.nlm.nih.gov/pubmed/37067807?tool=bestpractice.com [124]Bromley R, Adab N, Bluett-Duncan M, et al. Monotherapy treatment of epilepsy in pregnancy: congenital malformation outcomes in the child. Cochrane Database Syst Rev. 2023 Aug 29;8(8):CD010224. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD010224.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/37647086?tool=bestpractice.com
Inform women of childbearing potential that they must follow a pregnancy prevention program while on treatment with valproic acid and its derivatives. Some countries may also require that a pregnancy prevention program is in place for other anticonvulsants (e.g., topiramate).
Suitable anticonvulsants for women of childbearing potential include lamotrigine and levetiracetam.[114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com [118]Medicines and Healthcare products Regulatory Agency. Antiepileptic drugs in pregnancy: updated advice following comprehensive safety review. Jan 2021 [internet publication]. https://www.gov.uk/drug-safety-update/antiepileptic-drugs-in-pregnancy-updated-advice-following-comprehensive-safety-review Other options include oxcarbazepine, lacosamide, and zonisamide.[114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com However, treatment should always be tailored to the needs of the patient, also taking into account the underlying etiology of the seizures; the pharmacokinetic properties, mechanism of action, and available formulations of the drugs; and comorbidities and any other medications. Any anticonvulsant, including those not listed here, may be used as first-line monotherapy if it is the most suitable choice for a particular patient.
For women taking birth control pills, avoid anticonvulsants with enzyme-inducing properties (e.g., carbamazepine, phenytoin, phenobarbital, primidone), as these can lower contraceptive efficacy and lead to an increased failure rate.[119]American College of Obstetricians and Gynecologists. Gynecologic management of adolescents and young women with seizure disorders: ACOG Committee Opinion, number 806. Obstet Gynecol. 2020 May;135(5):e213-20. https://journals.lww.com/greenjournal/Fulltext/2020/05000/Gynecologic_Management_of_Adolescents_and_Young.55.aspx http://www.ncbi.nlm.nih.gov/pubmed/32332416?tool=bestpractice.com
For patients with psychiatric comorbidities: levetiracetam and zonisamide (as well as brivaracetam and perampanel) should only be used with great caution and with close monitoring for recurrence or exacerbation of psychiatric symptoms.
For patients with cognitive problems: zonisamide should only be used with great caution.
For patients with renal impairment: levetiracetam should be used with caution and on the advice of a specialist neurologist.
For patients who may have underlying liver disease or other comorbidities requiring multiple drug therapy, including P450 enzyme-inducing medication: levetiracetam (as well as gabapentin and pregabalin) may help minimize effects on the liver and reduce the potential for drug-drug interactions.
For patients with neuropathic pain: anticonvulsants with efficacy for certain neuropathic pain conditions include oxcarbazepine and carbamazepine (as well as gabapentin and pregabalin).[70]Tassone DM, Boyce E, Guyer J, et al. Pregabalin: a novel gamma-aminobutyric acid analogue in the treatment of neuropathic pain, partial-onset seizures, and anxiety disorders. Clin Ther. 2007 Jan;29(1):26-48.
http://www.ncbi.nlm.nih.gov/pubmed/17379045?tool=bestpractice.com
[71]Delahoy P, Thompson S, Marschner IC. Pregabalin versus gabapentin in partial epilepsy: a meta-analysis of dose-response relationships. BMC Neurol. 2010 Nov 1;10:104.
https://bmcneurol.biomedcentral.com/articles/10.1186/1471-2377-10-104
http://www.ncbi.nlm.nih.gov/pubmed/21040531?tool=bestpractice.com
[72]Panebianco M, Bresnahan R, Marson AG. Pregabalin add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2022 Mar 29;3:CD005612.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD005612.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/35349176?tool=bestpractice.com
[ ]
What are the effects of pregabalin add‐on for people with drug‐resistant focal epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3977/fullShow me the answer
Anticonvulsants associated with weight gain include gabapentin and pregabalin, and these should be used with great caution in patients with obesity. Zonisamide is associated with weight loss. For the most part, other anticonvulsants are considered not to affect body weight.
Avoiding sleep deprivation, alcohol, and excessive stress may be helpful at any stage of treatment, but cannot substitute for anticonvulsant therapy. There is some evidence that adjunctive psychologic and self‐management interventions can improve quality of life and patient outcomes that are important to people with epilepsy.[143]Michaelis R, Tang V, Nevitt SJ, et al. Psychological treatments for people with epilepsy. Cochrane Database Syst Rev. 2020 Sep 7;(8):CD012081.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012081.pub3/full
[144]Luedke MW, Blalock DV, Goldstein KM, et al. Self-management of epilepsy: a systematic review. Ann Intern Med. 2019 Jul 16;171(2):117-26.
http://www.ncbi.nlm.nih.gov/pubmed/31261386?tool=bestpractice.com
[145]Michaelis R, Tang V, Goldstein LH, et al. Psychological treatments for adults and children with epilepsy: evidence-based recommendations by the International League Against Epilepsy Psychology Task Force. Epilepsia. 2018 Jul;59(7):1282-302.
http://www.ncbi.nlm.nih.gov/pubmed/29917225?tool=bestpractice.com
[ ]
Do psychological treatments improve quality of life for people with epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3367/fullShow me the answer
Primary options
lamotrigine: consult specialist for guidance on dose
OR
levetiracetam: 500 mg orally twice daily initially, increase gradually according to response, maximum 3000 mg/day
Secondary options
oxcarbazepine: 300 mg orally twice daily initially, increase gradually according to response, maximum 2400 mg/day
Tertiary options
lacosamide: 100 mg orally twice daily initially, increase gradually according to response, maximum 400 mg/day
OR
zonisamide: 100 mg orally once daily initially, increase gradually according to response, maximum 400 mg/day
alternative anticonvulsant monotherapy
If the initial anticonvulsant is not effective or not tolerated, a second monotherapy trial is indicated, choosing a different anticonvulsant that is suitable for a woman of childbearing potential. A drug with a different mechanism of action should be considered.
Any anticonvulsant, including those not listed for first-line monotherapy above, may be used as second-line monotherapy if it is the most suitable choice for a particular patient.
If the first monotherapy agent is unsuitable due to intolerable adverse effects, the alternative agent should be chosen with special consideration for the patient's health profile and tolerance. Any new information that helps to define the epilepsy syndrome should be used to select the best-suited medication.
When changing from one anticonvulsant to another, current and new medications should be cross-titrated slowly; agents should not be started or stopped abruptly (the concomitant anticonvulsant is gradually reduced as the new agent is introduced). Research the specific pharmacokinetic profiles for each of the drugs before instructing the patient on how to switch. A written schedule helps patient adherence. Dose should be adjusted according to response and serum drug level.
Advise patients that there is an increased risk of seizures during this transition period.
anticonvulsant dual therapy
If two separate monotherapy trials at optimal doses do not result in adequate seizure control, a dual therapy trial may be initiated.
Use a combination of two anticonvulsants with different mechanisms of action (with the aim of maximizing efficacy and minimizing toxicity), or a combination of two drugs that have been shown to have anticonvulsant agonistic effects.[89]Li-Na Z, Deng C, Hai-Jiao W, et al. Indirect comparison of third-generation antiepileptic drugs as adjunctive treatment for uncontrolled focal epilepsy. Epilepsy Res. 2018 Jan;139:60-72.
http://www.ncbi.nlm.nih.gov/pubmed/29197667?tool=bestpractice.com
[90]Brigo F, Lattanzi S, Igwe SC, et al. Zonisamide add-on therapy for focal epilepsy. Cochrane Database Syst Rev. 2020 Jul 24;(7):CD001416.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001416.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/32715463?tool=bestpractice.com
[93]Panebianco M, Bresnahan R, Ramaratnam S, et al. Lamotrigine add-on therapy for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Mar 20;(3):CD001909.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001909.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/32196639?tool=bestpractice.com
[97]Bresnahan R, Atim-Oluk M, Marson AG. Oxcarbazepine add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Mar 4;(3):CD012433.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012433.pub2/full
http://www.ncbi.nlm.nih.gov/pubmed/32129501?tool=bestpractice.com
[98]Mbizvo GK, Chandrasekar B, Nevitt SJ, et al. Levetiracetam add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Jun 30;(6):CD001901.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001901.pub3/full
[99]Babar RK, Bresnahan R, Gillespie CS, et al. Lacosamide add-on therapy for focal epilepsy. Cochrane Database Syst Rev. 2021 May 17;(5):CD008841.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD008841.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/33998660?tool=bestpractice.com
[128]Zhu LN, Chen D, Xu D, et al. Newer antiepileptic drugs compared to levetiracetam as adjunctive treatments for uncontrolled focal epilepsy: an indirect comparison. Seizure. 2017 Oct;51:121-32.
https://www.seizure-journal.com/article/S1059-1311(17)30404-1/fulltext
http://www.ncbi.nlm.nih.gov/pubmed/28854405?tool=bestpractice.com
[ ]
What are the benefits and harms of lamotrigine add-on in adults or children with drug-resistant partial epilepsy?/cca.html?targetUrl=https://cochranelibrary.com/cca/doi/10.1002/cca.1474/fullShow me the answer
Anticonvulsants listed for monotherapy above are also the most suitable options for dual therapy in this population; however, any anticonvulsants may be used in combination if that is the most suitable choice for a particular patient.
A dose adjustment may be required when using two anticonvulsants together; consult a specialist for guidance on dose.
resective epilepsy surgery or neurostimulation or ketogenic diet
Failure of at least two anticonvulsants in combination (treatment-resistant or intractable epilepsy) should result in reassessment of the diagnosis. If the diagnosis is not secure, then reinvestigation, possibly with video/electroencephalogram (EEG) monitoring, may be helpful.
If the focal seizure diagnosis is correct, and the patient is truly refractory to anticonvulsants, consider and perform workup for epilepsy surgery or neurostimulation.
Consideration of these advanced options should be pursued at an epilepsy specialty center only.
Candidates for epilepsy surgery include patients with lesions on brain magnetic resonance imaging or in whom the epileptogenic area can be localized to one region by a variety of techniques, including EEG. Minimally invasive alternatives to traditional resective surgery include laser interstitial thermal therapy (LITT), radiofrequency ablation, and stereotactic radiosurgery.[149]Kohlhase K, Zöllner JP, Tandon N, et al. Comparison of minimally invasive and traditional surgical approaches for refractory mesial temporal lobe epilepsy: a systematic review and meta-analysis of outcomes. Epilepsia. 2021 Apr;62(4):831-45. https://onlinelibrary.wiley.com/doi/10.1111/epi.16846 http://www.ncbi.nlm.nih.gov/pubmed/33656182?tool=bestpractice.com [150]Grewal SS, Alvi MA, Lu VM, et al. Magnetic resonance-guided laser interstitial thermal therapy versus stereotactic radiosurgery for medically intractable temporal lobe epilepsy: a systematic review and meta-analysis of seizure outcomes and complications. World Neurosurg. 2019 Feb;122:e32-47. http://www.ncbi.nlm.nih.gov/pubmed/30244184?tool=bestpractice.com
If the patient has more than one epileptogenic focus, neurostimulation may be considered an alternative to surgery.[151]Boon P, De Cock E, Mertens A, et al. Neurostimulation for drug-resistant epilepsy: a systematic review of clinical evidence for efficacy, safety, contraindications and predictors for response. Curr Opin Neurol. 2018 Apr;31(2):198-210. http://www.ncbi.nlm.nih.gov/pubmed/29493559?tool=bestpractice.com Options include vagus nerve stimulation and deep brain stimulation.[152]Panebianco M, Rigby A, Weston J, et al. Vagus nerve stimulation for partial seizures. Cochrane Database Syst Rev. 2015 Apr 3;(4):CD002896. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD002896.pub2/full http://www.ncbi.nlm.nih.gov/pubmed/25835947?tool=bestpractice.com [153]Wang HJ, Tan G, Zhu LN, et al. Predictors of seizure reduction outcome after vagus nerve stimulation in drug-resistant epilepsy. Seizure. 2019 Mar;66:53-60. https://www.seizure-journal.com/article/S1059-1311(18)30760-X/fulltext http://www.ncbi.nlm.nih.gov/pubmed/30802843?tool=bestpractice.com [154]Li MCH, Cook MJ. Deep brain stimulation for drug-resistant epilepsy. Epilepsia. 2018 Feb;59(2):273-90. https://onlinelibrary.wiley.com/doi/full/10.1111/epi.13964 http://www.ncbi.nlm.nih.gov/pubmed/29218702?tool=bestpractice.com [155]Toffa DH, Touma L, El Meskine T, et al. Learnings from 30 years of reported efficacy and safety of vagus nerve stimulation (VNS) for epilepsy treatment: a critical review. Seizure. 2020 Dec;83:104-23. https://www.seizure-journal.com/article/S1059-1311(20)30309-5/fulltext http://www.ncbi.nlm.nih.gov/pubmed/33120323?tool=bestpractice.com Responsive neurostimulation (RNS) therapy may be appropriate for some medically refractory patients for whom resective surgery is not a viable option.[157]US Food and Drug Administration. RNS® System - P100026. Jan 2015 [internet publication]. http://wayback.archive-it.org/7993/20170112091430/http://www.fda.gov/MedicalDevices/ProductsandMedicalProcedures/DeviceApprovalsandClearances/Recently-ApprovedDevices/ucm376685.htm [158]Bergey GK, Morrell MJ, Mizrahi EM, et al. Long-term treatment with responsive brain stimulation in adults with refractory partial seizures. Neurology. 2015 Feb 24;84(8):810-7. https://n.neurology.org/content/84/8/810 http://www.ncbi.nlm.nih.gov/pubmed/25616485?tool=bestpractice.com [159]Heck CN, King-Stephens D, Massey AD, et al. Two-year seizure reduction in adults with medically intractable partial onset epilepsy treated with responsive neurostimulation: final results of the RNS System Pivotal trial. Epilepsia. 2014 Mar;55(3):432-41. https://onlinelibrary.wiley.com/doi/full/10.1111/epi.12534 http://www.ncbi.nlm.nih.gov/pubmed/24621228?tool=bestpractice.com [160]Morrell MJ; RNS System in Epilepsy Study Group. Responsive cortical stimulation for the treatment of medically intractable partial epilepsy. Neurology. 2011 Sep 27;77(13):1295-304. http://www.ncbi.nlm.nih.gov/pubmed/21917777?tool=bestpractice.com
The ketogenic diet is high in fat and low in carbohydrates, and has been shown to reduce seizure frequency.[161]Freeman JM, Kossoff EH, Freeman JB, et al. The ketogenic diet: a treatment for children and others with epilepsy. New York, NY: Demos Medical Publishing; 2006.[162]Martin-McGill KJ, Jackson CF, Bresnahan R, et al. Ketogenic diets for drug-resistant epilepsy. Cochrane Database Syst Rev. 2020 Jun 24;6(6):CD001903.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001903.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/32588435?tool=bestpractice.com
[163]Zhang Y, Xu J, Zhang K, et al. The anticonvulsant effects of ketogenic diet on epileptic seizures and potential mechanisms. Curr Neuropharmacol. 2018;16(1):66-70.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5771386
http://www.ncbi.nlm.nih.gov/pubmed/28521671?tool=bestpractice.com
[ ]
For people with drug‐resistant epilepsy, how do different ketogenic diets compare?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3256/fullShow me the answer
[
]
What are the effects of a ketogenic diet for people with drug‐resistant epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3229/fullShow me the answer The diet must be initiated in the hospital, under close medical supervision, with monitoring for metabolic acidosis and renal calculi.
pregnant
anticonvulsant monotherapy
Pregnant women with epilepsy should be under the care of a multidisciplinary team that includes a high-risk obstetric specialist, and care should be coordinated through joint obstetric and neurology clinics.[112]Stephen LJ, Harden C, Tomson T, et al. Management of epilepsy in women. Lancet Neurol. 2019 May;18(5):481-91. http://www.ncbi.nlm.nih.gov/pubmed/30857949?tool=bestpractice.com [113]Johansen-Bibby A. Prescribing for pregnancy: epilepsy. Drug Ther Bull. 2020 Jul;58(7):103-6. http://www.ncbi.nlm.nih.gov/pubmed/32503804?tool=bestpractice.com [114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com However, risk of cesarean delivery, late pregnancy bleeding, premature contractions, or premature labor and delivery are probably not substantially increased in women taking anticonvulsant drugs who do not smoke.[131]Harden CL, Hopp J, Ting TY, et al. Practice parameter update: management issues for women with epilepsy - focus on pregnancy (an evidence-based review): obstetrical complications and change in seizure frequency. Neurology. 2009 Jul 14;73(2):126-32. https://n.neurology.org/content/73/2/126.long http://www.ncbi.nlm.nih.gov/pubmed/19398682?tool=bestpractice.com
Particular care should be taken with anticonvulsant treatment for pregnant women. The latest data available on teratogenicity should be consulted.[114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com
Suitable anticonvulsants for pregnant women include lamotrigine and levetiracetam.[114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279.
https://www.neurology.org/doi/10.1212/WNL.0000000000209279
http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com
[118]Medicines and Healthcare products Regulatory Agency. Antiepileptic drugs in pregnancy: updated advice following comprehensive safety review. Jan 2021 [internet publication].
https://www.gov.uk/drug-safety-update/antiepileptic-drugs-in-pregnancy-updated-advice-following-comprehensive-safety-review
[ ]
How does levetiracetam compare with other anti‐epileptic drugs in terms of congenital malformations in children?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.2533/fullShow me the answer Other options include oxcarbazepine, lacosamide, and zonisamide.[114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279.
https://www.neurology.org/doi/10.1212/WNL.0000000000209279
http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com
Some anticonvulsants are contraindicated in pregnancy due to an increased risk of major congenital malformations and/or child neurodevelopmental disorders (e.g., valproic acid and its derivatives, topiramate, phenobarbital, phenytoin).[115]Wyszynski DF, Nambisan M, Surve T, et al; Antiepileptic Drug Pregnancy Registry. Increased rate of major malformations in offspring exposed to valproate during pregnancy. Neurology. 2005 Mar 22;64(6):961-5. http://www.ncbi.nlm.nih.gov/pubmed/15781808?tool=bestpractice.com [116]Holmes LB, Wyszynski DF, Lieberman E. The AED (antiepileptic drug) pregnancy registry: a 6-year experience. Arch Neurol. 2004 May;61(5):673-8. https://jamanetwork.com/journals/jamaneurology/fullarticle/785808 http://www.ncbi.nlm.nih.gov/pubmed/15148143?tool=bestpractice.com [117]Meador KJ, Baker GA, Browning N, et al; NEAD Study Group. Cognitive function at 3 years of age after fetal exposure to antiepileptic drugs. N Engl J Med. 2009 Apr 16;360(16):1597-605. http://www.ncbi.nlm.nih.gov/pubmed/19369666?tool=bestpractice.com [118]Medicines and Healthcare products Regulatory Agency. Antiepileptic drugs in pregnancy: updated advice following comprehensive safety review. Jan 2021 [internet publication]. https://www.gov.uk/drug-safety-update/antiepileptic-drugs-in-pregnancy-updated-advice-following-comprehensive-safety-review [120]Bjørk MH, Zoega H, Leinonen MK, et al. Association of prenatal exposure to antiseizure medication with risk of autism and intellectual disability. JAMA Neurol. 2022 Jul 1;79(7):672-81. https://jamanetwork.com/journals/jamaneurology/fullarticle/2793003 http://www.ncbi.nlm.nih.gov/pubmed/35639399?tool=bestpractice.com [123]Dreier JW, Bjørk MH, Alvestad S, et al. Prenatal exposure to antiseizure medication and incidence of childhood- and adolescence-onset psychiatric disorders. JAMA Neurol. 2023 Jun 1;80(6):568-77. http://www.ncbi.nlm.nih.gov/pubmed/37067807?tool=bestpractice.com [124]Bromley R, Adab N, Bluett-Duncan M, et al. Monotherapy treatment of epilepsy in pregnancy: congenital malformation outcomes in the child. Cochrane Database Syst Rev. 2023 Aug 29;8(8):CD010224. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD010224.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/37647086?tool=bestpractice.com [126]Athar F, Ehsan M, Farooq M, et al. Adverse fetal and neonatal outcomes following in-utero exposure to oxcarbazepine: a systematic review and meta-analysis. Br J Clin Pharmacol. 2022 Aug;88(8):3600-9. https://bpspubs.onlinelibrary.wiley.com/doi/10.1111/bcp.15413 http://www.ncbi.nlm.nih.gov/pubmed/35591806?tool=bestpractice.com
Monotherapy is preferable to polytherapy, but this is not always achievable. The lowest effective dose should be used.[118]Medicines and Healthcare products Regulatory Agency. Antiepileptic drugs in pregnancy: updated advice following comprehensive safety review. Jan 2021 [internet publication]. https://www.gov.uk/drug-safety-update/antiepileptic-drugs-in-pregnancy-updated-advice-following-comprehensive-safety-review
Serum levels of anticonvulsants may decline during pregnancy, with a potential loss of seizure control.[129]Harden CL, Pennell PB, Koppel BS, et al; American Academy of Neurology; American Epilepsy Society. Practice parameter update: management issues for women with epilepsy - focus on pregnancy (an evidence-based review): vitamin K, folic acid, blood levels, and breastfeeding. Neurology. 2009 Jul 14;73(2):142-9. https://n.neurology.org/content/73/2/142.full http://www.ncbi.nlm.nih.gov/pubmed/19398680?tool=bestpractice.com Therefore, close monitoring of serum drug levels and clinical response is advised.[118]Medicines and Healthcare products Regulatory Agency. Antiepileptic drugs in pregnancy: updated advice following comprehensive safety review. Jan 2021 [internet publication]. https://www.gov.uk/drug-safety-update/antiepileptic-drugs-in-pregnancy-updated-advice-following-comprehensive-safety-review
An anatomic ultrasound should be performed between 14 and 18 weeks of pregnancy, and serum alpha-fetoprotein level measured, to check for possible fetal abnormalities. The need for amniocentesis is on a case-by-case basis.
Primary options
lamotrigine: consult specialist for guidance on dose
OR
levetiracetam: 500 mg orally twice daily initially, increase gradually according to response, maximum 3000 mg/day
Secondary options
oxcarbazepine: 300 mg orally twice daily initially, increase gradually according to response, maximum 2400 mg/day
Tertiary options
lacosamide: 100 mg orally twice daily initially, increase gradually according to response, maximum 400 mg/day
OR
zonisamide: 100 mg orally once daily initially, increase gradually according to response, maximum 400 mg/day
folic acid
Treatment recommended for ALL patients in selected patient group
Women with epilepsy should be advised to take high-dose folic acid before conception and during pregnancy.[113]Johansen-Bibby A. Prescribing for pregnancy: epilepsy. Drug Ther Bull. 2020 Jul;58(7):103-6. http://www.ncbi.nlm.nih.gov/pubmed/32503804?tool=bestpractice.com [127]Royal College of Obstetricians and Gynaecologists. Epilepsy in pregnancy (Green-top Guideline No.68). Jun 2016 (updated May 2018) [internet publication]. https://www.rcog.org.uk/globalassets/documents/guidelines/green-top-guidelines/gtg68_epilepsy.pdf Folic acid supplementation (to help prevent neural tube defects in the developing fetus) is a routine recommendation for all women planning pregnancy, and any risk associated with folic acid supplementation is low. Evidence about the benefits of high-dose folic acid supplementation before and during pregnancy for women with epilepsy is inconclusive.[112]Stephen LJ, Harden C, Tomson T, et al. Management of epilepsy in women. Lancet Neurol. 2019 May;18(5):481-91. http://www.ncbi.nlm.nih.gov/pubmed/30857949?tool=bestpractice.com [114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com [129]Harden CL, Pennell PB, Koppel BS, et al; American Academy of Neurology; American Epilepsy Society. Practice parameter update: management issues for women with epilepsy - focus on pregnancy (an evidence-based review): vitamin K, folic acid, blood levels, and breastfeeding. Neurology. 2009 Jul 14;73(2):142-9. https://n.neurology.org/content/73/2/142.full http://www.ncbi.nlm.nih.gov/pubmed/19398680?tool=bestpractice.com [130]Morrow JI, Hunt SJ, Russell AJ, et al. Folic acid use and major congenital malformations in offspring of women with epilepsy: a prospective study from the UK Epilepsy and Pregnancy Register. J Neurol Neurosurg Psychiatry. 2009 May;80(5):506-11. http://www.ncbi.nlm.nih.gov/pubmed/18977812?tool=bestpractice.com
Primary options
folic acid (vitamin B9): 4-5 mg orally once daily
More folic acid (vitamin B9)Dose varies according to local guidelines. Lower doses may be recommended in some countries.
alternative anticonvulsant monotherapy
Pregnant women with epilepsy should be under the care of a multidisciplinary team that includes a high-risk obstetric specialist, and care should be coordinated through joint obstetric and neurology clinics.[112]Stephen LJ, Harden C, Tomson T, et al. Management of epilepsy in women. Lancet Neurol. 2019 May;18(5):481-91. http://www.ncbi.nlm.nih.gov/pubmed/30857949?tool=bestpractice.com [113]Johansen-Bibby A. Prescribing for pregnancy: epilepsy. Drug Ther Bull. 2020 Jul;58(7):103-6. http://www.ncbi.nlm.nih.gov/pubmed/32503804?tool=bestpractice.com [114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com
If the initial anticonvulsant is not effective or not tolerated, a second monotherapy trial is indicated, choosing a different anticonvulsant from among suitable options for pregnant women. A drug with a different mechanism of action should be considered.
Any anticonvulsant, including those not listed for first-line monotherapy above, may be used as second-line monotherapy if it is the most suitable choice for a particular patient (taking into account the latest data on teratogenicity).
If the first monotherapy agent is unsuitable due to intolerable adverse effects, the alternative agent should be chosen with special consideration for the patient's health profile and tolerance. Any new information that helps to define the epilepsy syndrome should be used to select the best-suited medication.
When changing from one anticonvulsant to another, the current and new medications should be cross-titrated slowly; agents should not be started or stopped abruptly (the concomitant anticonvulsant is gradually reduced as the new agent is introduced). Research the specific pharmacokinetic profiles for each of the drugs before instructing the patient on how to switch. A written schedule helps patient adherence. Dose should be adjusted according to response and serum drug level. Advise patients that there is an increased risk of seizures during this transition period.
folic acid
Treatment recommended for ALL patients in selected patient group
Women with epilepsy should be advised to take high-dose folic acid before conception and during pregnancy.[113]Johansen-Bibby A. Prescribing for pregnancy: epilepsy. Drug Ther Bull. 2020 Jul;58(7):103-6. http://www.ncbi.nlm.nih.gov/pubmed/32503804?tool=bestpractice.com [127]Royal College of Obstetricians and Gynaecologists. Epilepsy in pregnancy (Green-top Guideline No.68). Jun 2016 (updated May 2018) [internet publication]. https://www.rcog.org.uk/globalassets/documents/guidelines/green-top-guidelines/gtg68_epilepsy.pdf Folic acid supplementation (to help prevent neural tube defects in the developing fetus) is a routine recommendation for all women planning pregnancy, and any risk associated with folic acid supplementation is low. Evidence about the benefits of high-dose folic acid supplementation before and during pregnancy for women with epilepsy is inconclusive.[112]Stephen LJ, Harden C, Tomson T, et al. Management of epilepsy in women. Lancet Neurol. 2019 May;18(5):481-91. http://www.ncbi.nlm.nih.gov/pubmed/30857949?tool=bestpractice.com [114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com [129]Harden CL, Pennell PB, Koppel BS, et al; American Academy of Neurology; American Epilepsy Society. Practice parameter update: management issues for women with epilepsy - focus on pregnancy (an evidence-based review): vitamin K, folic acid, blood levels, and breastfeeding. Neurology. 2009 Jul 14;73(2):142-9. https://n.neurology.org/content/73/2/142.full http://www.ncbi.nlm.nih.gov/pubmed/19398680?tool=bestpractice.com [130]Morrow JI, Hunt SJ, Russell AJ, et al. Folic acid use and major congenital malformations in offspring of women with epilepsy: a prospective study from the UK Epilepsy and Pregnancy Register. J Neurol Neurosurg Psychiatry. 2009 May;80(5):506-11. http://www.ncbi.nlm.nih.gov/pubmed/18977812?tool=bestpractice.com
Primary options
folic acid (vitamin B9): 4-5 mg orally once daily
More folic acid (vitamin B9)Dose varies according to local guidelines. Lower doses may be recommended in some countries.
anticonvulsant dual therapy
Pregnant women with epilepsy should be under the care of a multidisciplinary team that includes a high-risk obstetric specialist, and care should be coordinated through joint obstetric and neurology clinics.[112]Stephen LJ, Harden C, Tomson T, et al. Management of epilepsy in women. Lancet Neurol. 2019 May;18(5):481-91. http://www.ncbi.nlm.nih.gov/pubmed/30857949?tool=bestpractice.com [113]Johansen-Bibby A. Prescribing for pregnancy: epilepsy. Drug Ther Bull. 2020 Jul;58(7):103-6. http://www.ncbi.nlm.nih.gov/pubmed/32503804?tool=bestpractice.com [114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com
If two separate monotherapy trials at optimal doses do not result in adequate seizure control, a dual therapy trial may be initiated after consultation with a specialist neurologist.
Use a combination of two anticonvulsants with different mechanisms of action (with the aim of maximizing efficacy and minimizing toxicity), or a combination of two drugs that have been shown to have anticonvulsant agonistic effects.[89]Li-Na Z, Deng C, Hai-Jiao W, et al. Indirect comparison of third-generation antiepileptic drugs as adjunctive treatment for uncontrolled focal epilepsy. Epilepsy Res. 2018 Jan;139:60-72.
http://www.ncbi.nlm.nih.gov/pubmed/29197667?tool=bestpractice.com
[90]Brigo F, Lattanzi S, Igwe SC, et al. Zonisamide add-on therapy for focal epilepsy. Cochrane Database Syst Rev. 2020 Jul 24;(7):CD001416.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001416.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/32715463?tool=bestpractice.com
[93]Panebianco M, Bresnahan R, Ramaratnam S, et al. Lamotrigine add-on therapy for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Mar 20;(3):CD001909.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001909.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/32196639?tool=bestpractice.com
[97]Bresnahan R, Atim-Oluk M, Marson AG. Oxcarbazepine add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Mar 4;(3):CD012433.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012433.pub2/full
http://www.ncbi.nlm.nih.gov/pubmed/32129501?tool=bestpractice.com
[98]Mbizvo GK, Chandrasekar B, Nevitt SJ, et al. Levetiracetam add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Jun 30;(6):CD001901.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001901.pub3/full
[99]Babar RK, Bresnahan R, Gillespie CS, et al. Lacosamide add-on therapy for focal epilepsy. Cochrane Database Syst Rev. 2021 May 17;(5):CD008841.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD008841.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/33998660?tool=bestpractice.com
[128]Zhu LN, Chen D, Xu D, et al. Newer antiepileptic drugs compared to levetiracetam as adjunctive treatments for uncontrolled focal epilepsy: an indirect comparison. Seizure. 2017 Oct;51:121-32.
https://www.seizure-journal.com/article/S1059-1311(17)30404-1/fulltext
http://www.ncbi.nlm.nih.gov/pubmed/28854405?tool=bestpractice.com
[ ]
What are the benefits and harms of lamotrigine add-on in adults or children with drug-resistant partial epilepsy?/cca.html?targetUrl=https://cochranelibrary.com/cca/doi/10.1002/cca.1474/fullShow me the answer
Anticonvulsants listed for monotherapy above are also the most suitable options for dual therapy in this population; however, any anticonvulsants may be used in combination if that is the most suitable choice for a particular patient (taking into account the latest data on teratogenicity).
A dose adjustment may be required when using two anticonvulsants together; consult a specialist for guidance on dose.
folic acid
Treatment recommended for ALL patients in selected patient group
Women with epilepsy should be advised to take high-dose folic acid before conception and during pregnancy.[113]Johansen-Bibby A. Prescribing for pregnancy: epilepsy. Drug Ther Bull. 2020 Jul;58(7):103-6. http://www.ncbi.nlm.nih.gov/pubmed/32503804?tool=bestpractice.com [127]Royal College of Obstetricians and Gynaecologists. Epilepsy in pregnancy (Green-top Guideline No.68). Jun 2016 (updated May 2018) [internet publication]. https://www.rcog.org.uk/globalassets/documents/guidelines/green-top-guidelines/gtg68_epilepsy.pdf Folic acid supplementation (to help prevent neural tube defects in the developing fetus) is a routine recommendation for all women planning pregnancy, and any risk associated with folic acid supplementation is low. Evidence about the benefits of high-dose folic acid supplementation before and during pregnancy for women with epilepsy is inconclusive.[112]Stephen LJ, Harden C, Tomson T, et al. Management of epilepsy in women. Lancet Neurol. 2019 May;18(5):481-91. http://www.ncbi.nlm.nih.gov/pubmed/30857949?tool=bestpractice.com [114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com [129]Harden CL, Pennell PB, Koppel BS, et al; American Academy of Neurology; American Epilepsy Society. Practice parameter update: management issues for women with epilepsy - focus on pregnancy (an evidence-based review): vitamin K, folic acid, blood levels, and breastfeeding. Neurology. 2009 Jul 14;73(2):142-9. https://n.neurology.org/content/73/2/142.full http://www.ncbi.nlm.nih.gov/pubmed/19398680?tool=bestpractice.com [130]Morrow JI, Hunt SJ, Russell AJ, et al. Folic acid use and major congenital malformations in offspring of women with epilepsy: a prospective study from the UK Epilepsy and Pregnancy Register. J Neurol Neurosurg Psychiatry. 2009 May;80(5):506-11. http://www.ncbi.nlm.nih.gov/pubmed/18977812?tool=bestpractice.com
Primary options
folic acid (vitamin B9): 4-5 mg orally once daily
More folic acid (vitamin B9)Dose varies according to local guidelines. Lower doses may be recommended in some countries.
children
anticonvulsant monotherapy
Treatment should be managed initially by a specialist pediatric neurologist.
Once focal seizures are diagnosed, determination of etiology is important for treatment decisions. For example, certain syndromes, such as the subtype of localization-related/idiopathic epilepsy called benign childhood epilepsy with centrotemporal spikes, often require no anticonvulsant drug treatment.[135]Ambrosetto G, Tassinari CA. Antiepileptic drug treatment of benign childhood epilepsy with rolandic spikes: is it necessary? Epilepsia. 1990 Nov-Dec;31(6):802-5. http://www.ncbi.nlm.nih.gov/pubmed/2123157?tool=bestpractice.com
In some cases (e.g., if seizure episodes are infrequent), it may be appropriate for the parent or caregiver to treat only the prolonged seizure with an acute therapy for aborting the seizure, such as rectal diazepam.
Treatment should always be tailored to the needs of the individual patient, taking into account age and sex; the underlying etiology of the seizures; the pharmacokinetic properties, mechanism of action, and available formulations of drug; and comorbidities and any other medications. Any anticonvulsant, including those not listed here, may be used as first-line monotherapy if it is the most suitable choice for a particular patient.
When selecting an appropriate anticonvulsant for a child, potential effects on cognition, learning, and behavior should be taken into account. For this reason, long-term treatment with anticonvulsants such as phenobarbital and phenytoin should be avoided. Data on the cognitive effects of newer anticonvulsants may not be available or may be limited.
Levetiracetam and oxcarbazepine are suggested as first-line options; they are effective and appear to have favorable profiles with regard to cognitive adverse effects.[136]Nevitt SJ, Sudell M, Weston J, et al. Antiepileptic drug monotherapy for epilepsy: a network meta-analysis of individual participant data. Cochrane Database Syst Rev. 2017 Dec 15;(12):CD011412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD011412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/29243813?tool=bestpractice.com
Other options for monotherapy in children include lamotrigine, lacosamide, eslicarbazepine, brivaracetam, carbamazepine, zonisamide, topiramate, perampanel, clobazam, and (other than for girls of childbearing potential) valproic acid.[136]Nevitt SJ, Sudell M, Weston J, et al. Antiepileptic drug monotherapy for epilepsy: a network meta-analysis of individual participant data. Cochrane Database Syst Rev. 2017 Dec 15;(12):CD011412. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD011412.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/29243813?tool=bestpractice.com [137]Schubert-Bast S, Willems LM, Kurlemann G, et al. Postmarketing experience with brivaracetam in the treatment of focal epilepsy in children and adolescents. Epilepsy Behav. 2018 Dec;89:89-93. http://www.ncbi.nlm.nih.gov/pubmed/30390435?tool=bestpractice.com [138]Arya R, Giridharan N, Anand V, et al. Clobazam monotherapy for focal or generalized seizures. Cochrane Database Syst Rev. 2018 Jul 11;(7):CD009258. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD009258.pub3/full http://www.ncbi.nlm.nih.gov/pubmed/29995989?tool=bestpractice.com
Care should be taken with anticonvulsant treatment for any girl of childbearing potential. The choice of anticonvulsant should be based upon the likelihood of pregnancy in the near future. The latest data available on teratogenicity should be consulted.[114]Pack AM, Oskoui M, Williams Roberson S, et al. Teratogenesis, perinatal, and neurodevelopmental outcomes after in utero exposure to antiseizure medication: practice guideline from the AAN, AES, and SMFM. Neurology. 2024 Jun;102(11):e209279. https://www.neurology.org/doi/10.1212/WNL.0000000000209279 http://www.ncbi.nlm.nih.gov/pubmed/38748979?tool=bestpractice.com Inform girls of childbearing potential that they must follow a pregnancy prevention program while on treatment with valproic acid and its derivatives. Some countries may also require that a pregnancy prevention program is in place for other anticonvulsants (e.g., topiramate).
For patients with psychiatric comorbidities: levetiracetam, brivaracetam, topiramate, zonisamide, and perampanel should only be used with great caution and with close monitoring for recurrence or exacerbation of psychiatric symptoms.
For patients with migraine as well as focal seizures: topiramate is effective as migraine prophylaxis (as is valproic acid).
Anticonvulsants associated with weight gain include valproic acid, gabapentin, and pregabalin, and these should be used with great caution in patients with obesity (they are not generally recommended for children anyway). Those associated with weight loss include topiramate and zonisamide. For the most part, other anticonvulsants are considered not to affect body weight.
Younger children often have more rapid clearance and variability in elimination kinetics of anticonvulsants; this must be factored into dosing regimens. Younger children may require liquid and/or chewable anticonvulsant formulations.
Avoiding sleep deprivation, alcohol, and excessive stress may be helpful at any stage of treatment, but cannot substitute for anticonvulsant therapy. There is some evidence that adjunctive psychologic and self‐management interventions can improve quality of life and patient outcomes that are important to people with epilepsy.[143]Michaelis R, Tang V, Nevitt SJ, et al. Psychological treatments for people with epilepsy. Cochrane Database Syst Rev. 2020 Sep 7;(8):CD012081.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012081.pub3/full
[144]Luedke MW, Blalock DV, Goldstein KM, et al. Self-management of epilepsy: a systematic review. Ann Intern Med. 2019 Jul 16;171(2):117-26.
http://www.ncbi.nlm.nih.gov/pubmed/31261386?tool=bestpractice.com
[145]Michaelis R, Tang V, Goldstein LH, et al. Psychological treatments for adults and children with epilepsy: evidence-based recommendations by the International League Against Epilepsy Psychology Task Force. Epilepsia. 2018 Jul;59(7):1282-302.
http://www.ncbi.nlm.nih.gov/pubmed/29917225?tool=bestpractice.com
[ ]
Do psychological treatments improve quality of life for people with epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3367/fullShow me the answer
Primary options
levetiracetam: consult specialist for guidance on dose
OR
oxcarbazepine: consult specialist for guidance on dose
Secondary options
lamotrigine: consult specialist for guidance on dose
OR
lacosamide: consult specialist for guidance on dose
OR
eslicarbazepine acetate: consult specialist for guidance on dose
OR
brivaracetam: consult specialist for guidance on dose
Tertiary options
valproic acid: consult specialist for guidance on dose
OR
carbamazepine: consult specialist for guidance on dose
OR
zonisamide: consult specialist for guidance on dose
OR
topiramate: consult specialist for guidance on dose
OR
perampanel: consult specialist for guidance on dose
OR
clobazam: consult specialist for guidance on dose
alternative anticonvulsant monotherapy
If the initial anticonvulsant is not effective or not tolerated, a second monotherapy trial is indicated, choosing a different anticonvulsant that is suitable for children. A drug with a different mechanism of action should be considered.
Any anticonvulsant, including those not listed for first-line monotherapy above, may be used as second-line monotherapy if it is the most suitable choice for a particular patient.
If the first monotherapy agent is unsuitable due to intolerable adverse effects, the alternative agent should be chosen with special consideration for the patient's health profile and tolerance. Any new information that helps to define the epilepsy syndrome should be used to select the best-suited medication.
When changing from one anticonvulsant to another, current and new medications should be cross-titrated slowly; agents should not be started or stopped abruptly (the concomitant anticonvulsant is gradually reduced as the new agent is introduced). Research the specific pharmacokinetic profiles for each of the drugs before instructing the patient, and their parents or caregivers if appropriate, on how to switch. A written schedule helps patient adherence. Dose should be adjusted according to response and serum drug level. Advise patients and their parents or caregivers that there is an increased risk of seizures during this transition period.
anticonvulsant dual therapy
If two separate monotherapy trials at optimal doses do not result in adequate seizure control, a dual therapy trial may be initiated after consultation with a specialist pediatric neurologist.
Use a combination of two anticonvulsants with different mechanisms of action (with the aim of maximizing efficacy and minimizing toxicity), or a combination of two drugs that have been shown to have anticonvulsant agonistic effects.[97]Bresnahan R, Atim-Oluk M, Marson AG. Oxcarbazepine add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Mar 4;(3):CD012433.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD012433.pub2/full
http://www.ncbi.nlm.nih.gov/pubmed/32129501?tool=bestpractice.com
[98]Mbizvo GK, Chandrasekar B, Nevitt SJ, et al. Levetiracetam add-on for drug-resistant focal epilepsy. Cochrane Database Syst Rev. 2020 Jun 30;(6):CD001901.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001901.pub3/full
[99]Babar RK, Bresnahan R, Gillespie CS, et al. Lacosamide add-on therapy for focal epilepsy. Cochrane Database Syst Rev. 2021 May 17;(5):CD008841.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD008841.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/33998660?tool=bestpractice.com
[105]Panebianco M, Prabhakar H, Marson AG. Rufinamide add-on therapy for drug-resistant epilepsy. Cochrane Database Syst Rev. 2020 Nov 8;(11):CD011772.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD011772.pub3/full
http://www.ncbi.nlm.nih.gov/pubmed/33179247?tool=bestpractice.com
[139]Cao Y, He X, Zhao L, et al. Efficacy and safety of levetiracetam as adjunctive treatment in children with focal onset seizures: a systematic review and meta-analysis. Epilepsy Res. 2019 Jul;153:40-8.
http://www.ncbi.nlm.nih.gov/pubmed/30965274?tool=bestpractice.com
[140]Lattanzi S, Brigo F, Grillo E, et al. Adjunctive eslicarbazepine acetate in pediatric patients with focal epilepsy: a systematic review and meta-analysis. CNS Drugs. 2018 Mar;32(3):189-96.
http://www.ncbi.nlm.nih.gov/pubmed/29508243?tool=bestpractice.com
[ ]
What are the benefits and harms of lamotrigine add-on in adults or children with drug-resistant partial epilepsy?/cca.html?targetUrl=https://cochranelibrary.com/cca/doi/10.1002/cca.1474/fullShow me the answer
Anticonvulsants listed for monotherapy above are also the most suitable options for dual therapy in this population; however, any anticonvulsants may be used in combination if that is the most suitable choice for a particular patient.
A dose adjustment may be required when using two anticonvulsants together; consult a specialist for guidance on dose.
resective epilepsy surgery or neurostimulation or ketogenic diet
Failure of at least two anticonvulsants in combination (treatment-resistant or intractable epilepsy) should result in a reassessment of the diagnosis. If the diagnosis is not secure, then reinvestigation, possibly with video/electroencephalogram (EEG) monitoring, may be helpful.
If the focal seizure diagnosis is correct, and the patient is truly refractory to anticonvulsants, consider and perform workup for epilepsy surgery or vagus nerve stimulation.
Consideration of these advanced options should be pursued at an epilepsy specialty center only.
Candidates for epilepsy surgery include patients with lesions on brain magnetic resonance imaging or in whom the epileptogenic area can be localized to one region by a variety of techniques, including EEG. Minimally invasive alternatives to traditional resective surgery include laser interstitial thermal therapy (LITT), radiofrequency ablation, and stereotactic radiosurgery.[149]Kohlhase K, Zöllner JP, Tandon N, et al. Comparison of minimally invasive and traditional surgical approaches for refractory mesial temporal lobe epilepsy: a systematic review and meta-analysis of outcomes. Epilepsia. 2021 Apr;62(4):831-45. https://onlinelibrary.wiley.com/doi/10.1111/epi.16846 http://www.ncbi.nlm.nih.gov/pubmed/33656182?tool=bestpractice.com [150]Grewal SS, Alvi MA, Lu VM, et al. Magnetic resonance-guided laser interstitial thermal therapy versus stereotactic radiosurgery for medically intractable temporal lobe epilepsy: a systematic review and meta-analysis of seizure outcomes and complications. World Neurosurg. 2019 Feb;122:e32-47. http://www.ncbi.nlm.nih.gov/pubmed/30244184?tool=bestpractice.com
If the patient has more than one epileptogenic focus, vagus nerve stimulation may be considered an alternative to surgery.[151]Boon P, De Cock E, Mertens A, et al. Neurostimulation for drug-resistant epilepsy: a systematic review of clinical evidence for efficacy, safety, contraindications and predictors for response. Curr Opin Neurol. 2018 Apr;31(2):198-210. http://www.ncbi.nlm.nih.gov/pubmed/29493559?tool=bestpractice.com [156]Morris GL 3rd, Gloss D, Buchhalter J, et al. Evidence-based guideline update: vagus nerve stimulation for the treatment of epilepsy. Report of the Guideline Development Subcommittee of the American Academy of Neurology. Neurology. 2013 Oct 15;81(16):1453-9. [Reaffirmed 2019.] https://n.neurology.org/content/81/16/1453.long http://www.ncbi.nlm.nih.gov/pubmed/23986299?tool=bestpractice.com
The ketogenic diet is high in fat and low in carbohydrates, and has been shown to reduce seizure frequency.[161]Freeman JM, Kossoff EH, Freeman JB, et al. The ketogenic diet: a treatment for children and others with epilepsy. New York, NY: Demos Medical Publishing; 2006.[162]Martin-McGill KJ, Jackson CF, Bresnahan R, et al. Ketogenic diets for drug-resistant epilepsy. Cochrane Database Syst Rev. 2020 Jun 24;6(6):CD001903.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD001903.pub5/full
http://www.ncbi.nlm.nih.gov/pubmed/32588435?tool=bestpractice.com
[163]Zhang Y, Xu J, Zhang K, et al. The anticonvulsant effects of ketogenic diet on epileptic seizures and potential mechanisms. Curr Neuropharmacol. 2018;16(1):66-70.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5771386
http://www.ncbi.nlm.nih.gov/pubmed/28521671?tool=bestpractice.com
[ ]
For people with drug‐resistant epilepsy, how do different ketogenic diets compare?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3256/fullShow me the answer
[
]
What are the effects of a ketogenic diet for people with drug‐resistant epilepsy?/cca.html?targetUrl=https://www.cochranelibrary.com/cca/doi/10.1002/cca.3229/fullShow me the answer The diet must be initiated in the hospital, under close medical supervision, with monitoring for metabolic acidosis and renal calculi.
Choose a patient group to see our recommendations
Please note that formulations/routes and doses may differ between drug names and brands, drug formularies, or locations. Treatment recommendations are specific to patient groups. See disclaimer
Use of this content is subject to our disclaimer