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Viagra (sildenafil citrate) came as a welcome relief to the patients suffering from ED. Before the advent of Viagra, the impotent men had to undergo painful surgeries and vacuum therapies to overcome their inabilities. Viagra is an FDA approved oral pill for the treatment of ED. Viagra prompted further research in this field and resultantly, two more drugs – Cialis and Levitra – got approval in 2003 as prescription drugs for the treatment of erectile dysfunction among men.

Clinical studies of about 4,000 men with erectile dysfunction showed that up to 72 percent reported they had successful intercourse after using Viagra, against 23 percent of men who took a placebo. Viagra works by improving the blood flow to the penis. More specifically, it inhibits the effects of an enzyme that acts to reverse erections after sex. Before Viagra came along, men with erectile problems had to forego sex, rely on mechanical devices such as a small pump to produce an erection, have surgical penile implants, or inject medicines directly into the penis.

Viagra comes under the class of drug called phosphodiesterase inhibitors, it controls and blocks an enzyme called phosphodiesterase-5 (pde-5), and helps the smooth muscles in the penis to get relaxed and widen, and that permits additional blood to run to the penis ensuing in faster and easier erection. Scientifically speaking, viagra which is an oral therapy for ED, is the citrate salt of sildenafil, which is a selective inhibitor of cyclic guanosine monophosphate-specific phosphodiesterase type 5 (pde5). Sildenafil is the main component of viagra, which blocks the activity of an enzyme, called phosphodiesterase type 5 (pde5), which is active in multiple tissues and cells. The effects of pde5 inhibition include improved production of nitric oxide, which is linked with enhanced functioning of the heart and blood vessels.

Majority of the people prefer to buy Viagra online. You can start enjoying your sex life once again in just few clicks. Let your limitations do not come between you and your partner. Go ahead, buy viagra online, and start living your life to the fullest.

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