비아그라에 대한 5가지 간단한 기술
The most common Unintended effects of VIAGRA: headache; flushing; upset abdomen; abnormal vision, for example variations in color vision (for instance having a blue color tinge) and blurred vision; stuffy or runny nose; again pain; muscle pain; nausea; dizziness; rash. an erection that will not disappear (priapism). In case you have an erection