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  2. 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 ...

  3. Vardenafil - Wikipedia

    en.wikipedia.org/wiki/Vardenafil

    Key:SECKRCOLJRRGGV-UHFFFAOYSA-N Y. (verify) Vardenafil 4 tablets Blister 20 mg. Vardenafil, sold under the brand name Levitra among others, is a medication that is used for treating erectile dysfunction. [1][2] It is a PDE5 inhibitor. [1] It is taken by mouth.

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

    www.aol.com/weighing-pros-cons-4-common...

    Advantages: Vardenafil lasts for longer than sildenafil and usually starts working faster. Disadvantages: Vardenafil is typically more expensive than sildenafil. Like sildenafil, it can only be ...

  5. How to Take Viagra for Best Results - AOL

    www.aol.com/viagra-best-results-105700318.html

    How to Use Viagra for Best Results. Viagra is great as an ED treatment, but taking it in particular conditions can make it even more effective. To get the best results from Viagra when treating ...

  6. Discovery and development of phosphodiesterase 5 inhibitors

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

    This allows for a longer therapeutic window and is therefore often a more convenient drug than others with a shorter therapeutic window. Tadalafil is more bioavailable (80%) than sildenafil (40%) and vardenafil (15%) but it has a slow absorption, or about 2 hours compared to 50 minutes of sildenfil. Vardenafil is most known for its potency. [24]

  7. 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]