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>>> back to Health Index Viagra information: Viagra is the first oral drug for male impotence. It works by dilating blood vessels, allowing the inflow of blood needed for an erection. Viagra causes erections only during sexual excitement. The light blue, diamond-shaped pill has become one of the most popular prescription drugs in the USA, UK, England, and many other countries. It is used to treat erectile dysfunction (ED): the inability of some men to get or maintain an erect penis. Viagra works by boosting the natural mechanism that leads to an erection. Viagra helps by elevating the levels of the chemical that causes the tissues to relax. By inhibiting the phosphodiesterase 5 (PDE5) enzyme, which is found mainly in the penis, Viagra allows the chemical produced during sexual stimulation, cyclic GMP, to persist. The longer cyclic GMP persists, the better the chance for increased blood flow. These effects were discovered accidentally. The Viagra pill was originally developed to improve blood supply to the heart in angina sufferers. Who can Viagra help? The Viagra pill can help impotence associated with diabetes, spinal cord injuries, prostate surgery, and even impotence with mysterious causes. Viagra was tested on 3,000 men with varying degrees of impotence. It achieved a success rate of 60-80%, depending on the dosage. |
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