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

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

    Here’s a list of both the half-lives and duration of action for four of the most common ED drugs (PDE5 inhibitors): Viagra (or sildenafil) lasts three to five hours after it’s consumed.

  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 ] It is taken by mouth .

  4. What Is the Safest ED Medication? - AOL

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

    The best way to keep yourself safe while using ED medication is to tell your healthcare provider about your full health history, including any current medical conditions and issues that you have ...

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

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

    Taking this medication with other medications and products can be dangerous, particularly when using: Nitrates. Alpha blockers. Grapefruit juice. Recreational drugs like cocaine. Supplements for ...

  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.

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