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

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

   The active ingredient in Cialis, tadalafil is a long-lasting medication that can provide relief from ED for up to 36 hours. Vardenafil. The active ingredient in Levitra, vardenafil can provide ...

3. 4 Common ED Pills: Weighing the Pros & Cons of Each - AOL

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

   Its long duration means side effects could last longer than with other ED pills. Tadalafil Pros. ... Vardenafil is the active ingredient in Levitra, and the FDA approved it in 2003.

4. Vardenafil - Wikipedia

   en.wikipedia.org/wiki/Vardenafil

   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 .

5. What Is the Safest ED Medication? - AOL

   www.aol.com/safest-ed-medication-105700669.html

   The active ingredient in Cialis, tadalafil is a long-lasting medication that can provide relief from ED for up to 36 hours. Vardenafil. The active ingredient in Levitra, vardenafil provides relief ...

6. Sildenafil - Wikipedia

   en.wikipedia.org/wiki/Sildenafil

   The Korean Court system made a ruling against Pfizer in June 2012, allowing for the unhindered domestic production of generic prescription sildenafil. [121] During 2012 Viagra lost its position as the top selling erectile dysfunction treatment in South Korea. This development was credited largely "due to the introduction of generic products."

7. Things You Probably Don't Know About Viagra (Like What It Was ...

   www.aol.com/things-probably-dont-know-viagra...

   How Long Does Viagra Last? This medication works for about four hours. So after taking Viagra, you should be able to get and maintain being hard enough (again, with stimulation) within that window ...