The commonest side effects of VIAGRA: headache; flushing; upset stomach; abnormal vision, for example changes in coloration eyesight (like getting a blue coloration tinge) and blurred eyesight; stuffy or runny nose; again agony; muscle discomfort; nausea; dizziness; rash. headache flushing upset stomach abnormal vision, like changes in coloration vision https://emilen530irx7.wikiadvocate.com/user