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Viagra
 Sildenafil (Viagra) was approved by the FDA in 1998. Viagra
offers the first oral medication for the treatment of
erectile
dysfunction. Sildenafil works by enhancing the effects of
nitric oxide. Nitric oxide is a chemical that relaxes the
muscles in the penis during sexual arousal. Enhancing the
effects of nitric oxide causes increased blood flow to the
penis. This enables a man to get and maintain an erection.
Viagra is taken orally 30-60 minutes prior to sexual activity,
and millions of men have benefited from it's effects.
Over 7
million American men are currently using Viagra to improve
their sexual function
Viagra is the most frequently prescribed treatment for
erectile dysfunction. Over 30 million American men experience
erectile dysfunction at some time in their lives.
82% of patients who take Viagra experience an improvement in
their erections, and a corresponding improvement in their
sexual lives. This translates into more than 4 out of every 5
couples who use Viagra reaping benefits from it. Viagra has proven
effective in literally thousands of clinical studies and
trials.
How does Viagra work?
In many men experiencing erectile dysfunction, Viagra helps
the body's natural erection process. When a man is sexually
aroused, the penis will fill with a sufficient quantity of
blood to cause an erection. During sexual arousal, the
arteries in the penis relax and widen, allowing more blood to
flow into the penis. As the arteries in the penis expand and
harden, the veins that normally carry blood away from the
penis become compressed, thus restricting the blood flow out
of the penis. With more blood flowing in and less flowing out,
the penis enlarges and this results in an erection. Viagra
increases blood flow to the penis, so that when a man is
sexually aroused, he can get and keep an erection. When the
sexual encounter is over, the erection goes away.
Sildenafil
The active ingredient in Viagra is Sildenafil Citrate.
Sildenafil is used as a treatment for men experiencing
erectile dysfunction (difficulty maintaining an erection).
Sildenafil works on enzymes of the body called
phosphodiesterases and improves a man's response to sexual
stimulation. Sildenafil works to control the enzyme, and by
doing so regulates the blood flow out of the penis. This
enables the individual to maintain an erection. These enzymes
work primarily in the penis, so the action of Viagra is almost
exclusively limited to the penis.
The U.S. Department of Health
and Human Services, Food and Drug Administration (FDA) offers
drug information about
Viagra and
other FDA approved drugs. Pfizer, the makers of Viagra,
offer resources and information about
erectile
dysfunction and Viagra. |
