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Sildenafil belongs to a group of medications called phosphodiesterase type 5 (PDE 5) inhibitors.
It works by helping the blood vessels to relax and allows blood to flow easily.
Sildenafil is prescribed to treat erectile dysfunction or impotence in men and pulmonary arterial hypertension in children and adults.
Take sildenafil tablets or liquid exactly one hour before sexual activity
Do not drive or operate heavy machinery as sildenafil can cause dizziness or visual disturbances.
Avoid taking sildenafil with a fatty meal as the fatty meal may slow its absorption.
Do not take two or more doses in a day or 24 hours.
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The class of drugs that Levitra, Viagra, Stendra, and Cialis belong to are called PDE5 inhibitors. They work by relaxing tight blood vessels, allowing more blood to surge into the penis and cause an erection, says Gregory Bales, M.D., an associate professor of urology at the University of Chicago.
The little pills do the trick for more than two-thirds of men with Viagra protects the heart (ED). They also work for guys who simply need them for a short time to get their “confidence back,” says Michael Eisenberg, M.D., director of male reproductive medicine and surgery at Stanford University.