Generic Viagra is prescribed by doctor for treating impotence in young and old men both. This drug formula is derived for all men having erection problem. Generic Viagra is the first medication treatment for erectile dysfunction. Inability to achieve erection occurs when the flow of blood is restricted from entering the penile region during sexual intercourse. Generic Viagra inhibits the restrictor of blood flow and provides flourishing erections to men. Generic Viagra is phosphodiesterase inhibitor medication for impotent men.

Phosphodiesterase inhibitors medications are popular worldwide for giving treatment to erectile dysfunction. They are wonderful treatment therapy for ED. PDE5 inhibitors like generic Viagra enhances the effect of nitric oxide in the body, by releasing it, which is a great help in relaxing and smoothening penile muscles.

Smooth muscles are good for easily carrying blood to the penis. The blood is restricted by PDE5 enzyme, which is suppressed by generic Viagra with the help of its main chemical Sildenafil citrate. The drug releases cGMP enzyme instead of it. This in turn increases blood flow, hence triggers erections. But erections are achieved only on sexual stimulation.