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  2. 4 Common ED Pills: Weighing the Pros & Cons of Each - AOL

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

    Sildenafil (Viagra) Tadalafil (Cialis) Vardenafil (Levitra) Avanafil (Stendra) All of these meds belong to a class of drugs called phosphodiesterase type 5 inhibitors, or PDE5 inhibitors. They ...

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

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

    Research shows that, when used properly, these ED pills can help improve function. Many of these pills work fairly quickly. Sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra ...

  4. Cialis vs. Viagra: How Are They Different? - AOL

    www.aol.com/cialis-vs-viagra-different-175700354...

    It depends who you ask. One of the main reasons people consider Cialis to be “better” than Viagra is that Cialis lasts longer. Cialis can last for up to 36 hours per dose, whereas a single ...

  5. Sildenafil - Wikipedia

    en.wikipedia.org/wiki/Sildenafil

    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] The reasons behind such use include the belief that the drug increases libido, improves sexual performance, [ 33 ] or permanently increases penis size. [ 34 ]

  6. Erectile dysfunction - Wikipedia

    en.wikipedia.org/wiki/Erectile_dysfunction

    Sildenafil, Tadalafil, Vardenafil [ 13 ] Erectile dysfunction (ED), also referred to as impotence, is a form of sexual dysfunction in males characterized by the persistent or recurring inability to achieve or maintain a penile erection with sufficient rigidity and duration for satisfactory sexual activity. It is the most common sexual problem ...

  7. cGMP-specific phosphodiesterase type 5 - Wikipedia

    en.wikipedia.org/wiki/CGMP-specific_phosphodi...

    Sildenafil (marketed as Viagra) was the first PDE5 inhibitor on the market. Originally created as a treatment for high blood pressure in 1989, it was found to have a secondary use as an effective PDE5 inhibitor, enabling men who use it to gain stronger erections after arousal. The FDA approved Viagra on March 27, 1998. [19]

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