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

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

    Tadalafil. The active ingredient in Cialis, tadalafil is a long-lasting medication that can provide relief from ED for up to 36 hours. Vardenafil. The active ingredient in Levitra, vardenafil can ...

  3. 4 Common ED Pills: Weighing the Pros & Cons of Each - AOL

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

    Sildenafil (Viagra) and vardenafil (Levitra) are short-acting. These “one-night” ED medications are both available as generics, making them good medications to try first. Tadalafil (Cialis) is ...

  4. Vardenafil - Wikipedia

    en.wikipedia.org/wiki/Vardenafil

    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 ethyl group. Tadalafil is structurally different from both sildenafil and vardenafil. Vardenafil's relatively short effective time is comparable to but somewhat longer than ...

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

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

    Tadalafil. The active ingredient in Cialis, tadalafil is a long-lasting medication that can provide relief from ED for up to 36 hours. Vardenafil. The active ingredient in Levitra, vardenafil can ...

  6. Discovery and development of phosphodiesterase 5 inhibitors

    en.wikipedia.org/wiki/Discovery_and_development...

    Sildenafil is a prototype of PDE5 inhibitors that Pfizer launched as Viagra. It was approved by the Food and Drug Administration (FDA) in 1998 as the first oral medicine for erectile dysfunction. Later, in the year 2005, it was approved for the treatment of pulmonary arterial hypertension. [2] Vardenafil and tadalafil were discovered in 1990.

  7. 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]

  8. Cialis Side Effects: What to Expect (& How to Avoid Them) - AOL

    www.aol.com/cialis-side-effects-expect-avoid...

    What Are the Side Effects of Cialis (Tadalafil)? Cialis has several common side effects, many of which also happen with other drugs used to treat ED, like sildenafil (generic Viagra®), vardenafil ...

  9. 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.

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