The commonest Negative effects of VIAGRA: headache; flushing; upset stomach; abnormal eyesight, such as variations in shade eyesight (for example aquiring a blue coloration tinge) and blurred vision; stuffy or runny nose; back again ache; muscle mass agony; nausea; dizziness; rash.Grapefruit juice: Grapefruit juice may interfere Using the absorptio… Read More