Viagra For Sale

Viagra belongs to the Phosphodiesterase 5 inhibitor (PDE 5) group of drugs. The mechanism of action is by inhibiting the enzyme phosphodiesterase 5 in the corpus cavernosum of the penis. The nitric oxide in the penis binds to the guanylate cyclase enzyme and there is an increase in the cyclic GMP. The increased cyclic GMP causes vasodilatation to the helicine arteries of the penis thereby causing an erection.

Thus Viagra is primarily indicated in the treatment of erectile dysfunction in men where they are unable to sustain a satisfactory erection to complete intercourse. Viagra has been prescribed for erectile dysfunction due to al causes including diabetes and antidepressant treatment.

It is also used in the treatment of pulmonary artery hypertension. As PDE 5 is specially distributed in the smooth muscle of the pulmonary and penile arteries, Viagra which is a PDE 5 inhibitor is used in the treatment of pulmonary artery hypertension too.

Even though Viagra is a drug prescribed for erectile dysfunction it has now become one of the recreational drugs. It is now been widely used by youngsters as they believe it to be very effective. It is also available as a non prescription Viagra.

The Canadian pharmacies also market Viagra in its generic as well as brand name with and without prescription. The Canadian pharmacies also market Viagra online where the websites of these companies provide the required information related to Viagra so that the customers get information regarding the drug before purchasing the drug. They also provide discounts and offers from time to time.