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2. Erectile dysfunction isn't just a blood flow issue. Here's ...

   www.aol.com/lifestyle/erectile-dysfunction-isnt...

   Erectile dysfunction can cause a “self-perpetuating cycle of anxiety and performance pressure,” says one expert. (Photo illustration: Victoria Ellis for Yahoo News; photo: Getty Images) (Photo ...

3. What Should I Do If Viagra Is Not Working for Me? - AOL

   www.aol.com/viagra-not-working-185700342.html

   We offer erectile dysfunction treatments online so you can treat ED quickly and conveniently. If Viagra doesn’t work for you, no biggie. If Viagra doesn’t work for you, no biggie.

4. Erectile dysfunction: Why it happens and how to cure it - AOL

   www.aol.com/news/erectile-dysfunction-help...

   With the first new treatment for erectile dysfunction in 25 years now available, we take a look at the common problem as a whole.

5. 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.

6. 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.

7. Can winter cause erectile dysfunction? - AOL

   www.aol.com/winter-cause-erectile-dysfunction...

   Winter erectile dysfunction could be caused by a variety of factors, including seasonal hormonal fluctuations, low vitamin D levels, seasonal depression, or lifestyle changes like reduced physical ...