This paper reviews literature on the adult outcomes for children diagnosed with attention deficit/hyperactivity disorder (AD/HD). It critiques methodological issues, including diagnostic definitions, research designs, sample characteristics, and assessment instruments. It examines the relationship of AD/HD to a variety of adult disorders and pathology, including: (1) impaired lifestyle functioning (continuance of AD/HD symptomology and educational or occupational problems); (2) substance abuse (alcohol and drugs); (3) social pathology (antisocial behavior, criminality, and pathological gambling); and (4) psychiatric symptoms (mood disorders, anxiety disorders, and antisocial personality disorder). The paper concludes that some individuals diagnosed with AD/HD in childhood continue to experience the full or partial syndrome in adulthood, tend to have lower educational and occupational status, have an increased risk for alcohol and substance abuse, and appear to be at greater risk for psychopathology. In particular, there seems to be a link between AD/HD in childhood and antisocial personality disorder in adulthood. (Contains 49 references.)