Description: Viagra works for 4 out of 5 Men! Viagra works by increasing the blood flow to the penis, thus making it easier for men to achieve erections.   Viagra belongs to a group of medicines that delay the enzymes called phosphodiesterases from working too quickly. The penis is one of the areas where these enzymes work.

Viagra is also used in both men and women to treat the symptoms of pulmonary arterial hypertension. This is the high blood pressure that occurs in the main artery that carries blood from the right side of the heart (the ventricle) to the lungs. When the smaller blood vessels in the lungs become more resistant to blood flow, the right ventricle must work harder to pump enough blood through the lungs. Viagra (Sildenafil) helps by increasing the supply of blood to the lungs and reducing the workload of the heart.

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