Composed Sildenafil citrate was originally developed by a major pharmaceutical group as a possible treatment for hypertension and other heart and circulatory problems.

During clinical trials the drug showed disappointing results in selected lung conditions set out, but an unexpected side effect that may be useful: erection of the penis.

The pharmaceutical company behind the original compound started to look Sildenafil as a treatment for erectile dysfunction. The patent followed in 1996 and once the FDA has approved its use for erectile dysfunction, in 1998, Sildenafil has become the first medical compound ED.

Patents held for Sildenafil were the source of much legal wrangling worldwide. In some countries Sildenafil is built without a licence because of local government policies.

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Erectile dysfunction, or ED, that is not convenient for people to discuss, but when men are no longer able to achieve or maintain an erection they need to talk with their doctor. Fortunately for these men, there are a variety of drugs out there that will help to regain control of their sex lives. There are many well-known drugs such as Viagra and Cialis, but there are also generic drugs that allow men to achieve the same results, but for less. Silagra is one of the many drugs that works equally well as Viagra, but is easier on the pocket book.

Many men who decide to be able to achieve and maintain an erection of new job is $ 10 a pill Viagra costs, but after paying this for a few months many men decide that they can not afford it. Other men are never able to afford expensive products such as Viagra and that is where Silagra and other drugs come into play. Silagra is exactly the same as the drug Viagra, is just cheaper. Both drugs are in fact sildenafil citrate, are sold only with different names. Viagra is more expensive because when people take this drug who pay not only for drugs, but the marketing that the company basa on to obtain the drug name out there.

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The clinical efficacy of erectogenic agents can be measured with a variety of instruments . The most common instrument is the global efficacy assessment question ( GAQ ), which asks patients ” Did the treatment that you used for your erections improve your erections during the time of therapy “. Although this is an important endpoint measure , it is not as rigorous as some other measures . However , it is the standard measurement for most clinical studies of erectile function agents . Other endpoints include a measurement of the percent of suc- cessful attempts at intercourse and a measurement of the International Index of Erectile Function ( LIEF ) with changes in the erectile function domain score from baseline to study completion . Using this score , values less than 10 sug- gest severe ED and values higher than 26 suggest normal erectile function . Other methods used for measurement include sexual encounter profile ques- tions ( SEP ). The SEP-2 asks , ” Were you able to insert your penis into your partner ‘ s vagina ” and the SEP-3 asks , ” Did your erections last long enough to have successful intercourse ?”
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