History of viagra clinical trials

Sildenafil, the active ingredient in Viagra, was originally developed to be a treatment for high blood pressure and cardiac problems. The researchers at Pfizer were aiming to make a drug for lowering blood pressure. When in the first phase, they were sure about the efficacy of sildenafil as blood pressure medications, they continued on to clinical trials.

After the reports of clinical trials were submitted, an interesting side effect of the medication came into view. Sildenafil caused an interesting side effect i.e. it lead to erections. This was highly unusual and the researchers saw the possibility of turning this side effect as a prospect of medication. There were no oral medications for the treatment of b>erection problems and if sildenafil helped men to get erections, then there was a huge, unmet and demanding market for it.

The original idea was dumped and more research was undertaken for sildenafil as an erectile dysfunction medication. Needless to say, the clinical trials were highly impressive and today we have sildenafil as the most popular drug for erectile dysfunction.

The phenomenal success of Viagra Sildenafil came as a surprise for everybody and everyone was talking about this drug. However, like every successful product, imitations and copies of Viagra also mushroomed and there are several fake Viagra medications available today in the market.

How to know if Viagra bought is genuine or not?

With fake and generic versions of Viagra available in abundance, it is very difficult to know if the Viagra you bought is genuine or not. The best thing to do is avoid fake Viagra instead of repenting later. You must always buy Viagra from a safe and reputed source online or a medical pharmacy and should avoid buying Viagra sold loosely at bars and shady shops. If you find a good site to buy Viagra online, and are not sure if it is legal or not, find out the following:

Is the website having a physical address and telephone number
Is the website protected by certificates and licenses
Is the website offering Viagra at unbelievably low price

If the website, does not have a proper correspondence address and works via email only or it does not have necessary licenses and certificates, steer clear of it. It is best to avoid websites that offer Viagra on discount and sale. It is natural to find Viagra at a lesser price online but if it is sold at unbelievably low price, it is advisable to keep your distance from those websites.