The most common Unwanted effects of VIAGRA: headache; flushing; upset belly; abnormal vision, for example variations in coloration eyesight (for instance aquiring a blue color tinge) and blurred vision; stuffy or runny nose; back ache; muscle pain; nausea; dizziness; rash. Revatio® is applied to deal with a unusual condition https://edwardw863rah1.jts-blog.com/profile