[Dose-effect relations. Doubleblind study on two different doses of pimozide (author's transl)].

Two identical groups of schizophrenic patients were treated for 28 days randomized with 3 and 8 mg of pimozide. In the antipsychotic efficacy no difference could be seen. Difference was in side effects: The 8-mg group had three times more extrapyramidal signs, mostly akathisia and agitation, and needed seven times more minor tranquilizer than the 3-mg group. Severe agitation as a psychotic symptom was equal in both groups. Preference therefore is given to the smaller dosage.