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  2. Sildenafil - Wikipedia

    en.wikipedia.org/wiki/Sildenafil

    Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [ 4 ] [ 8 ] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon . [ 9 ]

  3. How Much Viagra Is Too Much? - AOL

    www.aol.com/much-viagra-too-much-105700581.html

    The Bottom Line: How Much Viagra Is Too Much ED can undoubtedly be a hindrance to a satisfying bedroom life. Viagra is an efficient treatment for ED, but how much Viagra is too much?

  4. Do I Need to Avoid Any Foods When Taking Viagra? - AOL

    www.aol.com/avoid-foods-taking-viagra-105700883.html

    Viagra dosage can vary by person but is available in three doses: 25mg, 50mg and 100mg doses, with the 50mg option being the usual starting dose. This usual starting dose of 50mg is taken one hour ...

  5. Your ED Pill Guide: Everything You Need to Know Before ... - AOL

    www.aol.com/ed-pill-guide-everything-know...

    Viagra (or sildenafil) lasts three to five hours after it’s consumed. Cialis (tadalafil) has a half-life of 17.5 hours, meaning this drug lasts up to 36 hours after it’s consumed.

  6. What Happens If You Take 2 Viagra In 24 Hours? - AOL

    www.aol.com/happens-2-viagra-24-hours-135700769.html

    But if you’re still experiencing ED with a 50 mg dose, your provider will typically prescribe the 100 mg Viagra pills instead. In rare cases (say, if the 100 mg pills are out of stock), they ...

  7. PDE5 inhibitor - Wikipedia

    en.wikipedia.org/wiki/PDE5_inhibitor

    Chemical structure of sildenafil (Viagra), the prototypical PDE5 inhibitor. A phosphodiesterase type 5 inhibitor (PDE5 inhibitor) is a vasodilating drug that works by blocking the degradative action of cGMP-specific phosphodiesterase type 5 (PDE5) on cyclic GMP in the smooth muscle cells lining the blood vessels supplying various tissues.

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