Pharmacological treatments for first-episode schizophrenia.

Studies with first-episode populations offer the unique opportunity to examine the effectiveness and side effects of medications without the confounding effects of prior medication use. This review focuses upon studies of (1) treatment of the initial episode, (2) maintenance treatment issues, (3) recovery, and (4) side effects. Response rates for the initial episode are high with both conventional and new-generation antipsychotics. However, we lack data directly comparing the new-generation agents with one another for treatment of the initial episode, and data about options for patients with treatment resistance at illness onset are very limited. With the most commonly used pharmacological therapies, the course of early-phase schizophrenia is characterized by repeated relapses and a low rate of recovery. Medication treatment is also associated with a variety of side effects. Of particular concern for treatment of first-episode patients are the metabolic side effects with the new-generation antipsychotics because they occur rapidly, are very distressful to adolescents and young adults, and have long-term medical consequences. Available data support maintenance treatment to prevent relapse, but questions remain about the optimal duration of maintenance treatment, whether there are differences among the new-generation agents for maintenance treatment, and balancing the benefits of maintenance antipsychotics with their long-term side effects.