Performance related anxiety during sexual foreplay can prove detrimental in achieving orgasm for both man and his partner. So the researchers were delighted when many men in clinical trial were reported frequent occurrence of accustomed erection and improved sexual performance.

Following this finding and five year of clinical trial Viagra was approved as treatment for men suffering from difficulties in achieving erection. When FDA approved viagra as treatment for men impotence few medical discoveries generated as much excitement as the response to its availability of this wonder drug to deal with prevalent but embracing male problem of erectile dysfunction.

Viagra was approved by food and drug department in 1998. Later in 2003 Levitra and Cialis were also accepted by FDA as a drug designed to temporarily relive men suffering from Erectile Dysfunction. Now a whole range of medication is available in chemist shelves whose sole claim of fame is to create similar ecstasy.

The widespread use of these drugs have been unveiling new realties not exactly resuscitate the euphoria they generated at their advent .Several patient have complained sudden lose of vision immediately after using Viagra which caused a great degree of concern which forced FDA to conduct an investigation to establish a possible link between its use and vision loss. Although the Pfizer, the maker of viagra, denies any possible link between viagra and blindness, many patients complained NAION (non-artertic anterior ischemic optic neuropathy) vision loss occurring within 36hrs of Viagra dose.

Viagra and its generic version contains Sildenafil, the most common side-effects of sildenafil are headaches, facial flushing, indigestion, nasal congestion, transient disturbance of colour vision and raised blood pressure

Sildenafil should not be taken in conjunction with nitrates, including amyl nitrate (poppers) or drugs used to treat angina. If nitrates and sildenafil are taken together, blood pressure may fall to dangerously low levels.

As the new cases of disturbing side effect keep floating people are getting wary about the consequence these medications may cause. It doesn