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Sildenafil is the same medication found in the brand name Viagra. It is considered to be a generic version of the medication and therefore is a much cheaper option. Although it is the same chemical compound, it is only FDA approved for the treatment of pulmonary hypertension at the 20 mg dose. Using Sildenafil for erectile dysfunction is considered an off label use.
Sildenafil was initially designed to help lower blood pressure but is now typically used to treat erectile dysfunction.
Viagra is the brand name for Sildenafil Citrate and is used to treat erectile dysfunction.
Originally developed by scientists in the United Kingdom, it was brought onto the market by Pfizer Inc., an American pharmaceutical company.
Sildenafil can help men who cannot achieve or sustain an erection due to erectile dysfunction. It improves the erectile response when a man is already sexually stimulated, but it does not provide sexual stimulation. If there is no sexual stimulation, Viagra will not work.
People with HIV who take protease inhibitors should discuss using Sildenafil with their doctors, because protease inhibitors increase the likelihood and severity of side effects. Experts say that these individuals should have no more than 25 milligrams (mg), and not more often than every 48 hours.
If the individual is taking alpha-blockers, they should make sure they take Viagra at least 4 hours before or after to prevent dangerously low blood pressure.