The most typical Unwanted side effects of VIAGRA: headache; flushing; upset tummy; abnormal vision, which include adjustments in color vision (like getting a blue coloration tinge) and blurred eyesight; stuffy or runny nose; back again agony; muscle agony; nausea; dizziness; rash.an erection that won't go away (priapism). In case you have an erecti… Read More