Haloperidol decanoate: a depot antipsychotic.

This article reviews the role of a new depot antipsychotic dosage form, haloperidol decanoate (HD), in relationship to other comparable pharmacotherapies (oral and injectable). The chemistry, indications, contraindications, and pharmacokinetics of HD are discussed. The available clinical research in humans is presented and evaluated with respect to efficacy, adverse effects, and dosing. HD is clearly an effective antipsychotic dosage form. Certainly, HD can improve compliance and possibly outcome for selected patients. HD should be reserved for chronic relapsing schizophrenic patients who have responded to oral haloperidol. Considering the pharmacokinetics, potential risks, and cost of HD, the clinician needs to be prepared with recommendations to effect optimal use of HD (guidelines are presented).