비아그라 - 개요

The commonest Unwanted effects of VIAGRA: headache; flushing; upset stomach; irregular vision, for instance changes in colour vision (which include having a blue coloration tinge) and blurred vision; stuffy or runny nose; back again ache; muscle mass discomfort; nausea; dizziness; rash.On the whole, we advise patients to try sildenafil at a selecte