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  2. Viagra: What It Treats & Its Side Effects ( Plus What It Was ...

    www.aol.com/viagra-treats-side-effects-plus...

    What Was Sildenafil Used for Originally? Since 1998, the Pfizer-created drug sildenafil citrate has been a reliable treatment for the management of ED. But the active ingredient began its clinical ...

  3. 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 ]

  4. How Much Viagra Is Too Much? - AOL

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

    Sildenafil is the active ingredient in the medication and the name for generic Viagra. Viagra and Revatio are the drug’s brand names. Viagra doses range from 25 to 100 milligrams (mg). A typical ...

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

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

    Sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra) typically start working within 30 to 60 minutes, while avanafil (Stendra) works within 15 to 30 minutes. As with most prescription ...

  6. 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.

  7. How to Take Viagra for Best Results - AOL

    www.aol.com/viagra-best-results-105700318.html

    Like other prescription medicines, Viagra and its generic form, sildenafil, work best when you take them under the right conditions. Like other prescription medicines, Viagra and its generic form ...

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