The most common Negative effects of VIAGRA: headache; flushing; upset belly; abnormal vision, like changes in shade vision (such as getting a blue shade tinge) and blurred eyesight; stuffy or runny nose; again ache; muscle ache; nausea; dizziness; rash.Sildenafil also assists persons with pulmonary arterial hypertension (PAH) by calming the blood v… Read More