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

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

   Over the last 25 years, (ED) medications such as Viagra and others have become common and normal pieces of bedroom tool kit. These little pills have helped hundreds of millions of men all over the ...

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

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

   Tadalafil. 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 ...

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

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

   If you struggle with ED, drugs like Viagra®, sildenafil, tadalafil, and other FDA-approved medications could help with your performance. But if you’re not prescribed one of these meds, taking ...

5. Tadalafil - Wikipedia

   en.wikipedia.org/wiki/Tadalafil

   Although sildenafil, vardenafil, and tadalafil all work by inhibiting PDE5, tadalafil's pharmacologic distinction is its longer half-life (17.5 hours), [21] compared to sildenafil and vardenafil, which are both 4–5 hours. [22] This translates to a longer duration of action, which is partly responsible for "The Weekend Pill" nickname.

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

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

   Loss of hearing. Priapism. Sildenafil could also cause an increased risk of heart attack or other heart problems. ... Other medications for ED, like Cialis (tadalafil), Levitra (vardenafil), and ...

8. Cialis Side Effects: What to Expect (& How to Avoid Them) - AOL

   www.aol.com/cialis-side-effects-expect-avoid...

   According to a 2008 review of studies on tadalafil, 15 percent of men who used this medication at its highest recommended dose (20 milligrams) experienced headaches.

9. Sildenafil - Wikipedia

   en.wikipedia.org/wiki/Sildenafil

   In July 2005, the US Food and Drug Administration (FDA) updated labeling for tadalafil (Cialis), vardenafil (Levitra), and sildenafil (Viagra) to reflect a small number of post-marketing reports of sudden vision loss, while acknowledging that "...it is not possible to determine whether these oral medicines for erectile dysfunction were the ...