These medicines all work well for ED. Its effects might last longer if you have mild to moderate ED. Oral ED medicines might not work or might be dangerous if you also take any of the following: Nitrate medicines. It works for up to 36 hours. Oral medicine for ED also might not be safe or work well if you have: Very low blood pressure, called hypotension, or uncontrolled high blood pressure, called hypertension. If you prefer, you may contact the U.AdSay Goodbye to Performance Anxiety and Hello to Improved Sexual Stamina! Take Charge of Your Sexual Health with Our Top-Rated Male Enhancement Products!Honest & Unbiased Reviews · Over 20 Years Online · Over Products Tested. Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum recommended dose is . Consumer Reports Best Buy Drugs shares how you might be able to get generic Viagra, known as sildenafil, at a much lower price.

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