[ case of priapism following atypical anyipsychotic drugs]

Priapism is a rare but serious side effect of psychotropic drugs with incidence of 15-26%. Approximately all of the atypical antipsychotic drugs are reported with this complication. In this report a 24-years old man with multiple delusions which was treated with risperidone [6mg], was affected by priapism after two months. After drug dose reduction and finally discontinuation, olanzapine [5mg] was started. Only one dose of this drug causes recurrence of priapism. Therefore this drug was discontinued also. After clozapine starting [150mg],priapism was induced. Therefore it is necessary for physicians whom prescribe serotonin-dopamin antagonist drugs must consider this rare but serious side effect