Predictors of response to high dose antipsychotics in chronic schizophrenics.

Significant numbers of chronic schizophrenic patients do not experience sufficient symptom relief from usual doses of antipsychotic medication. Clinicians must decide if high doses of antipsychotics should be tried. In this study baseline symptoms, drug levels, and the symptomatic effects of an acute stimulant challenge were examined before 14 subjects received a 50% increase in their antipsychotic dosing. The group as a whole did not improve. Several individuals with lower drug levels, high baseline hallucinations, and stimulant-induced improvement in hallucinations improved mildly after 3 weeks on the higher antipsychotic dose.