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

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

    Generally, there is no major difference in the effectiveness of Viagra vs Cialis. Both tablets can be taken at least 30 minutes to an hour before performing. The difference lies primarily in the ...

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

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

    Many of these pills work fairly quickly. Sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra) typically start working within 30 to 60 minutes, while avanafil (Stendra) works within 15 ...

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

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

    Currently, the most effective way to treat ED is through the use of medications like sildenafil (the active ingredient in Viagra) and others. This article originally appeared on Hims.com and was ...

  5. Sildenafil - Wikipedia

    en.wikipedia.org/wiki/Sildenafil

    Sildenafil, sold under the brand name Viagra, among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [4] [8] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon. [9] It is unclear if it is effective for treating sexual dysfunction in females. [8]

  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. 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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