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

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

    Tadalafil is available in several dosages, from a minimum dosage of 2.5mg (milligrams) all the way up to a 20mg per tablet, the maximum dose of tadalafil in 24 hours. Tadalafil 10mg: Typical ...

  3. Tadalafil - Wikipedia

    en.wikipedia.org/wiki/Tadalafil

    Tadalafil is an annulated 2,5-diketopiperazine. [25] It is also a 1,2,3,4-tetrahydro-β-carboline. Tadalafil can be synthesized starting from (D)-tryptophan methyl ester and piperonal via a Pictet–Spengler reaction. This is followed by condensations with chloroacetyl chloride and methylamine to complete the diketopiperazine ring: [26]

  4. Is It Safe to Take Cialis Daily? - AOL

    www.aol.com/safe-cialis-daily-115900442.html

    Unlike other ED medications, such as Viagra® (sildenafil) and Levitra® (vardenafil), which work for four to five hours per dose, Cialis® (which contains the active ingredient tadalafil) is a ...

  5. 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 ...

  6. Macitentan/tadalafil - Wikipedia

    en.wikipedia.org/wiki/Macitentan/tadalafil

    Macitentan/tadalafil, sold under the brand name Opsynvi, is a fixed dose combination medication used for the treatment of pulmonary arterial hypertension. [2] It contains macitentan , an endothelin receptor antagonist (ERA); and tadalafil , a phosphodiesterase 5 (PDE5) inhibitor .

  7. Vardenafil - Wikipedia

    en.wikipedia.org/wiki/Vardenafil

    Vardenafil's indications and contraindications are the same as with other PDE5 inhibitors; it is closely related in function to sildenafil citrate (Viagra) and tadalafil (Cialis). 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 ...

  8. Got Headaches from Viagra or Cialis? Here's Why & How to Treat It

    www.aol.com/got-headaches-viagra-cialis-heres...

    Headaches are a common side effect of ED medications such as sildenafil (the active ingredient in Viagra), tadalafil (Cialis) and vardenafil (Levitra), with about 25 percent of men prescribed ...

  9. cGMP-specific phosphodiesterase type 5 - Wikipedia

    en.wikipedia.org/wiki/CGMP-specific_phosphodi...

    Tadalafil (marketed as Cialis) is a PDE5 inhibitor used to treat erectile dysfunction [23] and pulmonary arterial hypertension. [24] It has a longer half life than sildenafil of 17.5 hours, allowing it to be taken once a day. [24] Tadalafil "daily" (5 mg) is also used for treatment of benign prostate hyperplasia. [25]

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