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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. 5 Must-Know Tips Before Taking Sildenafil 100mg - AOL

   www.aol.com/5-must-know-tips-taking-105700758.html

   How effective 100 mg sildenafil is. How long it takes to kick in. Side effects to watch out for. Let’s dive into how you can take this medication for optimal results. samael334/Istockphoto.

4. Facing Off Against Counterfeit Online Pharmacies: Pfizer ...

   www.aol.com/news/2013-05-06-facing-off-against...

   A 2011 national survey of 1,000 men with ED conducted by Harris Interactive, sponsored by NABP and Pfizer, found that more than 4 in 5 men (82 percent) believe it is difficult to determine if an ...

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. 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. Erectile dysfunction - Wikipedia

   en.wikipedia.org/wiki/Erectile_dysfunction

   The PDE5 inhibitors sildenafil (Viagra), vardenafil (Levitra) and tadalafil (Cialis) are prescription drugs which are taken by mouth. [10]: 20–21 As of 2018, sildenafil is available in the UK without a prescription. [54]

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

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

   Sildenafil can still be used to treat hypertension, but today, the primary use of this PDE5 inhibitor is to remedy ED. Other first-line treatment options for blood pressure and heart disease are ...

9. Aildenafil - Wikipedia

   en.wikipedia.org/wiki/Aildenafil

   Aildenafil (methisosildenafil) is a synthetic drug that is a structural analog of sildenafil (Viagra). [1] It was first reported in 2003. [2] Like sildenafil, aildenafil is a phosphodiesterase type 5 inhibitor. Aildenafil has been found as an adulterant in a variety of supplements which are sold as "natural" or "herbal" sexual enhancement products.