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

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

    This prescription drug is taken as needed to get and maintain hard during intimacy. As long as it’s used as directed, it’s considered safe and effective. What Is Viagra/Sildenafil Used For?

  3. Sildenafil - Wikipedia

    en.wikipedia.org/wiki/Sildenafil

    Sildenafil's popularity with young adults has increased over the years. [32] Sildenafil's brand name, Viagra, is widely recognized in popular culture, and the drug's association with treating erectile dysfunction has led to its recreational use. [33]

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

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    Many of these pills work fairly quickly. Sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra) typically start working within 30 to 60 minutes, while avanafil (Stendra) works within 15 ...

  5. 4 Common ED Pills: Weighing the Pros & Cons of Each - AOL

    www.aol.com/4-common-ed-pills-weighing-141800609...

    Sildenafil is the OG prescription medication for ED. It came onto the market in the late ’90s under the brand name Viagra. For several years, it was the only medication available for men with ED.

  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

    According to the Food and Drug Administration (FDA), it usually takes 30 to 60 minutes for Viagra or generic sildenafil to start producing a noticeable improvement in your climax quality.