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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...

   Like sildenafil, tadalafil has a long track record. It’s been researched extensively, meaning both its effects and side effects are well-known. Best for: Men who like a long-lasting pill to ...

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

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

   Sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra) typically start working within 30 to 60 minutes, while avanafil (Stendra) works within 15 to 30 minutes. As with most prescription ...

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

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

   This side effect was most common in guys who took 10 to 20 milligrams of Cialis a day. Tadalafil Side Effects Long-Term. There are no known long-term side effects of tadalafil. In fact, studies ...

5. 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]

6. Tadalafil - Wikipedia

   en.wikipedia.org/wiki/Tadalafil

   20 mg Cialis tablet. Tadalafil is used to treat erectile dysfunction, benign prostatic hyperplasia, and pulmonary arterial hypertension. [8] In the US, tadalafil (as Cialis) is indicated for the treatment of erectile dysfunction and the signs and symptoms of benign prostatic hyperplasia; [5] and (as Adcirca) for the treatment of pulmonary arterial hypertension to improve exercise ability.

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

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

   Although Cialis and Viagra both make it easier to get and maintain an erection, there are a few key differences between these two ED medications that may make one a better choice than the other ...

8. Vardenafil - Wikipedia

   en.wikipedia.org/wiki/Vardenafil

   Vardenafil's indications and contraindications are the same as with other PDE5 inhibitors; it is closely related in function to sildenafil citrate (Viagra) and tadalafil (Cialis). The difference between the vardenafil molecule and sildenafil citrate is a nitrogen atom's position and the change of sildenafil's piperazine ring methyl group to an ...

9. Tadalafil: Your Ultimate Guide to Dosages, Side Effects & More

   www.aol.com/tadalafil-ultimate-guide-dosages...

   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 ...