비아그라에 대한 5가지 쉬운 사실 설명

an erection that won't disappear (priapism). In case you have an erection that lasts a lot more than 4 several hours, get professional medical enable without delay. If It's not at all handled straight away, priapism can forever injury your penis.In case you’ve currently experienced NAION or have crowded optic disc, you could have a better danger