Viagra Pfizer

Viagra Pfizer



 Viagra is a medication to treat erectile dysfunction (ED, impotence). Viagra dose is 25 to 100 mg taken as needed, approximately 1 hour before sexual activity, but only once a day.Sildenafil citrate, commonly known as Viagra, is a drug used to treat erectile dysfunction in men (impotence), developed by the pharmaceutical company Pfizer pills are blue with the words Pfizer-of-a-side and VGR 100 - on the other. Part of the physiological process of erection involves release of nitric oxide (NO) in the corpus cavernosum. This activates the enzyme guanylate cyclase resulting in increased levels of cyclic guanosine monophosphate (cGMP), leading to smooth muscle relaxation in the corpus cavernosum, resulting in increased blood flow and an erection.