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  2. Vardenafil - Wikipedia

    en.wikipedia.org/wiki/Vardenafil

    Vardenafil 4 tablets Blister 20 mg. 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. [1]

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

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

    A typical dose of sildenafil lasts roughly four hours, making it a good option if you want an ED pill designed to last for one night of activity. ... Vardenafil is the active ingredient in Levitra ...

  4. What Is the Safest ED Medication? - AOL

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

    Viagra (sildenafil), Cialis (tadalafil), Levitra (vardenafil), Stendra (avanafil) and Caverject (alprostadil) are all FDA-approved for the treatment of ED and safe for most men to use.

  5. 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 ...

  6. Therapeutic index - Wikipedia

    en.wikipedia.org/wiki/Therapeutic_index

    All modern healthcare systems dictate a maximum safe dose for each drug, and generally have numerous safeguards (e.g. insurance quantity limits and government-enforced maximum quantity/time-frame limits) to prevent the prescription and dispensing of quantities exceeding the highest dosage which has been demonstrated to be safe for members of ...

  7. 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.

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