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Viagra is a brand-name medication used to treat erectile dysfunction (ED) in men. Its active ingredient, sildenafil, is available in both brand-name and generic versions.
How Viagra works:
Viagra is a phosphodiesterase-5 (PDE5) inhibitor, meaning it relaxes muscles and increases blood flow to the penis during sexual stimulation. It helps achieve and maintain an erection, but it does not cause an erection without sexual arousal.
How to take Viagra:
Take Viagra orally, usually 30 minutes to 1 hour before sexual activity.
You may take it up to 4 hours beforehand.
Do not take more than one dose in a 24-hour period.
The standard starting dose for ED is 50 mg, but it can be adjusted by your doctor.
Taking it on an empty stomach may cause it to work faster, while a high-fat meal may delay its effects.
Important safety considerations:1999
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