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  2. 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 ...

  3. Sildenafil - Wikipedia

    en.wikipedia.org/wiki/Sildenafil

    This metabolite also has an affinity for the PDE receptors, about 40% of that of sildenafil. Thus, the metabolite is responsible for about 20% of sildenafil's action. Sildenafil is excreted as metabolites predominantly in the feces (about 80% of administered oral dose) and to a lesser extent in the urine (around 13% of the administered oral dose).

  4. 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.

  5. 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.

  6. 4 Common ED Pills: Weighing the Pros & Cons of Each - AOL

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

    Over the last 25 years, (ED) medications like Viagra and Cialis have become common fixtures in bedrooms around the world. These little pills have helped hundreds of millions of men get hard and ...

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

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

    Benefits of Viagra: What Does Sildenafil Do for Men? Plenty of claims have been made about the health benefits of Viagra for men. Sildenafil’s ability to increase blood flow makes the medication ...

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