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  2. What Is the Safest ED Medication? - AOL

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

    The active ingredient in Levitra, vardenafil provides relief from ED for four to five hours. Avanafil. Sold as Stendra, avanafil is a newer treatment that provides relief from ED for up to six ...

  3. 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]

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

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

    The Best ED Medication for Men: Pros & Cons of Top ED Pills. Over the last 25 years, (ED) medications like Viagra and Cialis have become common fixtures in bedrooms around the world.

  5. Drug coupon - Wikipedia

    en.wikipedia.org/wiki/Drug_Coupon

    Drug coupon advocates argue that coupon programs enhance medication adherence by reducing or eliminating drug copays. [2] As of 2008, the U.S. Food and Drug Administration (FDA) was planning a study to see if coupons make patients overlook drug risks and side effects in their effort to save money. [2] All medicines come with a certain level of ...

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

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

    Other medications for ED, like Cialis (tadalafil), Levitra (vardenafil), and Stendra (avanafil), may also help. Follow the guidance of a medical professional. Always consult a trusted healthcare ...

  7. PDE5 inhibitor - Wikipedia

    en.wikipedia.org/wiki/PDE5_inhibitor

    Chemical structure of sildenafil (Viagra), the prototypical PDE5 inhibitor. A phosphodiesterase type 5 inhibitor (PDE5 inhibitor) is a vasodilating drug that works by blocking the degradative action of cGMP-specific phosphodiesterase type 5 (PDE5) on cyclic GMP in the smooth muscle cells lining the blood vessels supplying various tissues.