Therapeutic Drug Monitoring of Antipsychotics

Therapeutic drug monitoring of conventional and atypical antipsychotics offers numerous clinical advantages to the clinician. These include cost savings, decreased risk of toxicity, and improved compliance. Among these drugs, studies of haloperidol, olanzapine, and clozapine have provided the most compelling data to justify therapeutic drug monitoring. Among atypical antipsychotics, although data document the utility of routine monitoring of clozapine and olanzapine blood levels, there are no similar data available for either risperidone or quetiapine. Additionally, the utility of therapeutic drug monitoring is enhanced by the availability of prospective dosing schemes for haloperidol, olanzapine, and clozapine.