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2. Does Viagra Help Me Last Longer in Bed? - AOL

   www.aol.com/does-viagra-help-last-longer...

   Because brand name Viagra, also known as sildenafil citrate, is thought of as a “cure-all” for intimate ailments (but mostly for ED), many men turn to it as a solution to the oldest problem ...

3. 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.

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

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   Below, we’ll explain the origin story of Viagra, what this boner-benefitting pill can do, the benefits of Viagra for men, and the potential side effects of taking it. samael334/istockphoto What ...

5. 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]

6. Discovery and development of phosphodiesterase 5 inhibitors

   en.wikipedia.org/wiki/Discovery_and_development...

   Figure 3. A flow chart showing the relationship between different parts (domains) of PDE5-inhibitors. Figure 4. A representation of the 3D structure of sildenafil, a common PDE5-inhibitor. The PDE5 inhibitors sildenafil, vardenafil and tadalafil are competitive and reversible inhibitors of cGMP hydrolysis by the catalytic side of PDE5.

7. 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?

8. 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.

9. What Happens If You Take Viagra and You Don't Need It? - AOL

   www.aol.com/happens-viagra-dont-105800158.html

   There’s not much research about the long-term dangers of taking ED meds recreationally, but there's more than enough information available about the general risk factors of taking this ...