Viagra was developed in the United Kingdom. In 1998, the American pharmaceutical company Pfizer Inc. launched the drug on the market.The generic name for Viagra is sildenafil and Viagra is a brand name. The drug is also known by the name of Revatio. Viagra works by slowing down the action of PDE5, an enzyme that acts on the tissues of the penis.The PDE5 enzyme breaks down a substance responsible for blood flow into the penis. Inhibition of PDE5 increases blood flow to the penis. This helps men achieve and maintain an erection.However, sildenafil can only help maintain an erection during physical stimulation.Viagra (sildenafil) relaxes the muscles of the walls of the blood vessels and increases blood flow to particular areas of the body.Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women.With age, our body undergoes several changes and, together with your body, your sexual stamina also undergoes many changes. You may experience low libido or erectile dysfunction. In women, one of the main changes observed is vaginal dryness. This does not mean that your sexual power has reached the end.You can have an active sex life for a lifetime.click Buy Now.....
