비아그라에 대한 모든 것
The commonest Unwanted side effects of VIAGRA: headache; flushing; upset tummy; irregular eyesight, including changes in color eyesight (such as getting a blue shade tinge) and blurred eyesight; stuffy or runny nose; back ache; muscle mass agony; nausea; dizziness; rash.an erection that won't go away (priapism). For those who have an erection that