Cialis is the latest drug approved by the FDA for impotence treatment. Prior to approving Cialis in December 2003, the FDA had approved Viagra in March 1998 and Levitra in August 2003. All the 3 medications viz. Viagra , Levitra and Cialis belong to the same class of medicines called PDE5 inhibitors and therefore their mechanism of action is the same. However, having enjoyed complete monopoly for 5-years, Viagra became a household name as well as the most popular impotence treatment drug.

Levitra , a slightly improved version of Viagra in terms of time taken to become effective and the duration it remains effective, failed to break the monopoly of Viagra in the oral impotence pills market. Cialis, on the other hand, captured the attention just when it was launched. In fact, Cialis is giving both Viagra and Levitra a run for their money as it has become one of the most prescribed impotence treatment drugs mainly because of its fast acting and longer-lasting properties.

Viagra for erectile dysfunction or impotence
Viagra was the first-ever prescription drug to be formally launched for the treatment of erectile dysfunction. Also known as impotence erectile dysfunction is a common condition found in men. The primary characteristic of this condition is having difficulty in achieving and/or maintaining an erection, even when sexually aroused. Estimates reveal that possibly one out of every ten males may be suffering from erectile dysfunction, differing only by levels of severity. However, Viagra deserves the sole credit for bringing erectile dysfunction out in the open. In fact, about a year back, millions of men and their partners testified that Viagra has seriously helped them in the bedroom.

Viagra Overview
There is absolutely no question that the little blue pill is a phenomenon in its own right. In fact, it would not be wrong to acknowledge that nothing will ever equal the attention, the excitement, or the hope that Viagra has managed to generate. A specific PDE5 inhibitor, Viagra causes the blood vessels to dilate. It particularly works on the receptors in the lungs and the genitalia. However, Viagra will not cause an erection without sexual stimulation. All the news, stories, rumors and even jokes apart, Viagra the wonder drug, is in reality intended for men who are medically impotent for reasons of vascular deficiency, inadequate blood flow or neurological damage.

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