비아그라에 대한 5가지 쉬운 사실 설명
an erection that won't disappear (priapism). Should you have an erection that lasts in excess of 4 hours, get medical enable without delay. If It's not at all handled at once, priapism can completely damage your penis.
Priapism warning: This drug might cause priapism, that is an erection