Viagra affects blood cells and bloods vessels in the head, skin, causing annoying side effects such as headaches, flushed skin and indigestion, dizziness, hearing loss and visual effects such as blurred vision. Viagra works by causing the arteries to expand in order to encourage increased blood flow to the penis. This, in turn, affects the blood pressure and can possibly contribute to the development of an abnormal heart rate, a stroke or a heart attack. Hence it should be used only under medical supervision.
I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
What is the maximum mg dosage of SILDENAFIL CITRATE a heart-healthy, very physically fit (20 mile bike rides) 64 year old can safely take?