The most common Unwanted side effects of VIAGRA: headache; flushing; upset belly; irregular vision, which include variations in colour eyesight (for instance having a blue color tinge) and blurred eyesight; stuffy or runny nose; back again agony; muscle mass agony; nausea; dizziness; rash. The commonest Uncomfortable side effects of VIAGRA: https://chamfortf987wac0.wikiannouncing.com/user