The most typical Unintended effects of VIAGRA: headache; flushing; upset stomach; abnormal vision, such as improvements in colour eyesight (which include possessing a blue coloration tinge) and blurred eyesight; stuffy or runny nose; back soreness; muscle mass discomfort; nausea; dizziness; rash.Sa?l?k Bakan? Fahrettin Koca, sahte ilaç iddialar?yl