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2. Tips For Seniors Over 65 With ED - AOL

   www.aol.com/tips-seniors-over-65-ed-125700073.html

   Can an 80-year-old man get hard? The short answer is yes. But there are some reasons why it may be more difficult for older men to get aroused during stimulation than younger men.

3. 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 ...

4. 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 ...

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

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

   Because of the risks of this medication, people taking alpha-blockers, over-the-counter nitrate supplements (like amyl nitrate, isosorbide mononitrate, isosorbide dinitrate, or nitroglycerin) or ...

6. Erectile dysfunction - Wikipedia

   en.wikipedia.org/wiki/Erectile_dysfunction

   Erectile dysfunction (ED), also referred to as impotence, is a form of sexual dysfunction in males characterized by the persistent or recurring inability to achieve or maintain a penile erection with sufficient rigidity and duration for satisfactory sexual activity.

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.

8. 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.

9. cGMP-specific phosphodiesterase type 5 - Wikipedia

   en.wikipedia.org/wiki/CGMP-specific_phosphodi...

   The most commonly available PDE5 inhibitors are sildenafil (Viagra), [14] vardenafil (Levitra), [15] tadalafil (Cialis), [16] and avanafil (Stendra). [17] PDE5 inhibitors are not routinely prescribed as first line treatment for erectile dysfunction. This is as they cause unwanted side effects like hair loss, headache, and nausea (among others ...