Sildenafil may be used to treat erectile dysfunction (ED or impotence) in men (Viagra brand) or pulmonary arterial hypertension in both men and women (Revatio brand), depending on the brand. Sildenafil blocks the action of an enzyme known as cGMP-specific phosphodiesterase type-5 (PDE-5).Proper Use Use sildenafil exactly as directed by your doctor. Sexual activity may be a strain on your heart, especially if you have heart disease. Do not take a double dose to make up for a missed one. Dosing The dose of this medicine will be different for different patients. This medicine comes with a patient information leaflet. You are encouraged to report adverse events related to Viatris products by calling U. · Description and Brand Names. Drug information provided by: Merative, Micromedex ®. US Brand Name. Revatio. Viagra. Descriptions. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis. You can take the mg and mg doses as shortly as 15 minutes before sexual activity. As a second-generation medication, Stendra also seems to have milder side effects than Viagra and the.This medicine usually begins to work for erectile dysfunction within 30 minutes after taking it. Adults 65 years of age and older—25 mg as a single dose no more than once a day, 1 hour before sexual intercourse. This increased blood flow can cause an erection. The body takes longer to absorb it after a high-fat meal or alcohol. It comes as standard tablets, chewable tablets, and as a liquid that you swallow. Children 1 year of age and older weighing 20 to 45 kg—20 mg 3 times a day.

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