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It is very interesting to know how Viagra became a medicine to cure erectile dysfunction.

Initially, this drug was prescribed by doctors in the United States to the cardiac problems sufferers. It was a surprise that the subjects were not returning unused samples to the doctors. Patients motivated their option that this drug was resulting in enhanced erection - as an unexpected side effect. By consequence they were using it for erectile purposes, not cardiac.

This side-effect leads medical world to a totally new discovery. It resulted in diverting research to a totally different area, erectile dysfunction. Moreover, any patient with coronary heart diseases, who is taking nitrate medication, should not take Viagra unless it is specifically prescribed by his health care.

Many unadvised people think Viagra is a sex stimulant, but this is not real. If a normal person takes this tablet thinking it an aphrodisiac, it will be very disappointed not receiving expected effect.

These pills containing sildenafil citrate are specific drugs effectively used for erectile dysfunction treatment. The drug is effective only on those patients who are suffering from erectile dysfunction, especially the ones who are suffering from long standing diabetes, in whom the blood vessels get narrowed down and also the nerves carrying sensations get affected.

Sildenafil's mission is to work on enzymes of the body called phosphodiesterases and to improve a man's response to sexual stimulation. It works by helping to relax the smooth muscles in the penis during sexual arousal and by consequence allowing increased blood flow. There in nothing aphrodisiac here. This blue pill is effective all cases of erectile dysfunction, whether caused by any psychological reason, physical or due to the old age.

It is very important that Viagra to be taken under a doctor's supervision and not purchased over the counter as many men do.