Are allergic to sildenafil, as contained in VIAGRA and Revatio®, or any in the elements in VIAGRA The most common Unwanted side effects of VIAGRA: headache; flushing; upset belly; irregular eyesight, for example improvements in shade eyesight (for example having a blue color tinge) and blurred eyesight; stuffy or runny https://www.allbanglanewspaper.xyz/