The early recognition and management of a first episode of schizophrenic il
lness is a difficult task, with identification complicated by a broad diffe
rential diagnosis, lack of definitive data on the prognostic implications o
f premorbid/prodromal symptoms, and, until recently, treatment limited to p
harmacologic agents with severe adverse effects. The first psychotic episod
e in patients with schizophrenia is the most responsive to treatment in ter
ms of both rate and degree. However, first-episode patients are also more l
ikely to develop motor side effects, even at lower medication doses, than m
ultiepisode patients. Considerable evidence supports the assertion that ear
ly treatment can improve outcome and possibly prevent the development of fu
ll-blown illness in high-risk individuals. There is evidence that atypical
antipsychotic medications are effective in the treatment of first-episode s
chizophrenia and are well tolerated. The improved tolerability associated w
ith the newer antipsychotic medications, including a lower risk for motor s
ide effects and possible lower risk for development of tardive dyskinesia,
has swung the risk-benefit balance in favor of early and aggressive treatme
nt. By intervening early and providing long-term maintenance treatment, the
course of schizophrenic illness may be altered in the coming years with ov
erall decreased deterioration and chronicity and overall improved functioni
ng resulting in lower societal costs.