The most typical Unintended effects of VIAGRA: headache; flushing; upset abdomen; irregular vision, such as modifications in shade vision (which include possessing a blue coloration tinge) and blurred eyesight; stuffy or runny nose; back agony; muscle discomfort; nausea; dizziness; rash.are allergic to sildenafil, as contained in VIAGRA and Revatio… Read More