SummaryRisperidone (Risperdal) is a recently released novel antipsychotic medication. It is different from the conventional neuroleptics, such as haloperidol, as it has both serotinergic and dopaminergic activity. It has a more tolerable side-effect profile compared with other antipsychotic medications. We review the literature regarding the side effects of risperidone use, describe a case of overdose with risperidone, and discuss the clinical sequelae and management of such an overdose.