The main group of drugs are inhibitors
Be sure to select a Tribulus extract that contains at least 45% protodioscin.. Impotence, or erectile dysfunction, was once regarded as a man's worst nightmare. Several types of FDA approved vacuum therapy devices are available with a doctor's prescription. The current diagnostic and statistical manual of mental diseases (DSM-IV) has included a listing for impotence. A note of caution: Although there are many Tribulus extracts available over the counter today, almost all of these have been found not to contain any significant amount of the active ingredient.
Other studies have suggested that Tribulus also acts by increasing the level of dehydroepiandrosterone (DHEA), a naturally occurring substance in the body believed to be important for a healthy sex drive. As testosterone and other male sex hormone levels start to drop after reaching middle age, low testosterone level is often the culprit in most intermittent impotence problems, especially in older men. Modern drug therapy for ED made a significant advance in 1983, when British physiologist Giles Brindley dropped his trousers and demonstrated to a shocked Urodynamics Society audience his papaverine-induced erection. The drug Brindley injected into his penis was a non-specific vasodilator, an alpha-blocking agent, and the mechanism of action was clearly corporal smooth muscle relaxation.
One of the most promising herbs is the purified extract of Tribulus terrestris. More than nine clinical studies performed by six universities and academic hospitals on this purified extract have confirmed the herb's beneficial effect. Men with primary impotence have never had sufficient erections for satisfactory intercourse. A useful and simple way to distinguish between physiological and psychological impotence is to determine whether the patient ever has an erection. There are two forms of impotence: primary and secondary. The active ingredient of Tribulus acts as a natural precursor to these hormones and is converted into its final forms by the body's own natural enzymes. Impotence was once solely defined as the inability to achieve an erection. The active ingredient of Tribulus acts as a natural precursor to these hormones and is converted into its final forms by the body's own natural enzymes. If you use these recreational drugs, however, you have bigger health problems than just impotence.