The commonest Unintended effects of VIAGRA: headache; flushing; upset belly; abnormal vision, which include improvements in coloration vision (like using a blue shade tinge) and blurred vision; stuffy or runny nose; back ache; muscle mass ache; nausea; dizziness; rash.Sildenafil also will help folks with pulmonary arterial hypertension (PAH) by cal… Read More