비아그라에 대해 알려지지 않은 사실
The commonest side effects of VIAGRA: headache; flushing; upset stomach; irregular vision, which include improvements in shade vision (such as using a blue colour tinge) and blurred vision; stuffy or runny nose; back again soreness; muscle ache; nausea; dizziness; rash.an erection that will not disappear (priapism). Should you have an erection that