Priapism a rare side effect of Cilostazol

We present the case of priapism associated with cilostazol. A rare side effect of cilostazol on the genitourinary system. Priapism is a long-lasting erection that occurs without sexual arousal or stimulation. It can cause irreversible damage on penis. Therefore, urgent treatment is required. Priapism can be treated with aspiration, intracavernous injection or, as in our case, with surgical ligation. Priapism is a common side effect of phosphodiesterase 5 inhibitors. However, this situation is very rare for cilostazol, one of the phosphodiesterase 3 inhibitors.