비아그라에 대한 5가지 간단한 설명 설명

an erection that won't disappear (priapism). When you've got an erection that lasts more than four several hours, get medical assist straight away. If It isn't handled immediately, priapism can permanently injury your penisSildenafil boosts the influence of NO by inhibiting phosphodiesterase sort 5 (PDE5), that's responsible for degradation of cGMP

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