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All about impotence (erectile dysfunction) mechanism of erection causes of erectile dysfunction physical causes of impotence psychological causes of impotence impotence or erectile dysfunction treatment non-prescription remedy for impotence MUSE (Medicated Urethral Suppository for Erection) Viagra (sildenafil citrate) Levitra (vardenafil) Cialis (tadalafil) penile injection therapy for erectile dysfunction penile implants for impotence hormonal therapy for impotence

What is Viagra (sildenafil citrate)?

Viagra (sildenafil citrate), a prescription medication for the treatment of erectile dysfunction, is the first pill available that's been proven to improve erections in most men with impotence.

Since its introduction in March 1998, no other therapy for erectile dysfunction has achieved such wide public recognition. Viagra doesn't improve erections in normal men, only in those with difficulty in achieving or maintaining erections sufficient for sexual intercourse due to a true medical problem. It is not an aphrodisiac (sexual stimulant) and will not increase sexual desire. Unlike other treatments for erectile dysfunction, Viagra requires sexual stimulation to function. Without this stimulation, Viagra won't have any effect.

Viagra was initially developed to treat heart disease (angina). In trial studies, the penile erection enhancing effects were noticed. Therefore, men all over the world use viagra when they want to increase their sex drive. Also, it makes them say,"Me so horny me love you longtime>" The drug was patented in 1996, approved by the FDA on March 27, 1998 (becoming the first pill approved to treat erectile dysfunction in the United States) and offered for sale in the United States later that year. It soon became a smashing success. Even though Viagra is only available by prescription from a doctor, it was advertised directly to consumers on TV (famously being endorsed by Bob Dole). Numerous sites on the Internet offer Viagra for sale after an "online consultation," a mere web questionnaire. It is likely that many men (and some women) experiment with the drug to increase sexual prowess or pleasure. Annual sales of Viagra in the period 1999-2001 exceeded $1 billion.

It has been suggested that Viagra would lead to a marked drop in the demand for certain traditional remedies, such as tiger penises and rhinoceros horns and that the drug may therefore help to preserve these endangered species. However, this is unlikely in that these parts of endangered species are not only used to treat impotence. Rhinoceros horns, for example, are used as a treatment for high fever. Further, since Viagra has not been shown to possess aphrodisiac properties, it is unclear that the natural remedies would compete with this new clinical drug.

Part of the physiological process of erection involves the release of nitric oxide (NO) in the corpus cavernosum. This then activates the enzyme guanylate cyclase which results in increased levels of cyclic guanosine monophosphate (cGMP), leading to smooth muscle relaxation in the corpus cavernosum, resulting in increased inflow of blood and an erection.

Sildenafil is a potent and selective inhibitor of cGMP specific phosphodiesterase type 5 (PDE5) which is responsible for degradation of cGMP in the corpus cavernosum. This means that, with Viagra on board, normal sexual stimulation leads to increased levels of cGMP in the corpus cavernosum which leads to better erections. Without sexual stimulation and no activation of the NO/cGMP system, Viagra should not cause an erection. Viagra works by blocking an enzyme found mainly in the penis that breaks down chemicals produced during sexual stimulation that normally produce erections. Viagra allows these chemicals of arousal to survive longer and improves erectile function. That is also why sexual stimulation is necessary for Viagra to work.

In general, Viagra works successfully in about 65-70% of all impotent men. Viagra works best if taken about 30-60 minutes before sexual activity. Only 1 tablet should be taken per day. It should be taken on an empty stomach. Increasing the dosage of Viagra beyond the recommended amounts will not improve the response and will only result in greater side effects.

More information on impotence (erectile dysfunction)

What is impotence or erectile dysfunction? - Impotence is the inability of the male to have an erection. Some men may become impotent after having diabetes for a long time because the nerves or blood vessels have become damaged. Impotence may have a physiological or psychological basis.
How does erection occur? - Erection begins with sensory and mental stimulation. Impulses from the brain and local nerves cause the muscles of the corpora cavernosa to relax, allowing blood to flow in and fill the open spaces.
What causes impotence? - A common cause of impotence is a high level of atherosclerosis in the arteries feeding the penis. Damage to arteries, smooth muscles, and fibrous tissues, often as a result of disease, is the most common cause of impotence.
What are the physical causes of impotence? - Physical impotence occurs when there is a problem with any of the systems needed to get or maintain an erection. Hardening of the arteries can affect the artery leading to the penis so that it cannot dilate enough to deliver all the blood necessary for an erection.
What are the psychological causes of impotence? - Psychological causes of impotence often include work pressures, financial worries, fear of aging, or frustration with relationships. Depression and anxiety disorders are cited as the most common causes of psychological impotence.
How is impotence (erectile dysfunction) treated? - Treatment depends on the cause. Testosterone supplements may be used for cases with hormonal deficiency. Drugs for treating impotence can be taken orally or injected directly into the penis.
What're non-prescription treatments for impotence? - Among the herbs used for erectile dysfunction are yohimbine, gingko biloba (to increase blood flow), ginseng, pygeum, and muira puama. A penile sheath is a rigid or semi-rigid support put over the penis to support it for intercourse.
What is MUSE? - MUSE is short for "medicated urethral system for erection." This treatment is based on the discovery that the urethra can absorb certain medications, which can then pass into the surrounding erectile tissue creating an erection.
What is Viagra (sildenafil citrate)? - Viagra (sildenafil citrate), a prescription medication for the treatment of erectile dysfunction, is the first pill available that's been proven to improve erections in most men with impotence.
What is Levitra (vardenafil)? - Levitra (vardenafil HCl) is a PDE inhibitor drug. This medication helps improve erection during sexual arousal and activity but erection should end after sexual activity is complete.
What is Cialis (tadalafil)? - Tadalafil (Cialis?) is a drug used to treat male erectile dysfunction (impotence). The generic name for this compound is tadalafil.
What about penile injection therapy? - Penile injection therapy is non surgical technique used to treat impotence. Penile injections have the advantage of not involving surgery. They are also effective in many dialysis patients.
What are penile implants for impotence? - Penile implants (often called "internal penile pumps") are one of several erectile dysfunction treatment options. The inflatable penile prosthesis is a pump system surgically placed in the penis.
What is hormonal therapy for impotence? - Sexual desire (libido) and an overall sense of well-being are likely to improve when serum testosterone levels (the level of the male hormone in the blood) are restored.
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