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

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

   The FDA (U.S. Food and Drug Administration) suggests taking Cialis at a maximum as-needed dosage of 10 milligrams no more than once per 72 hours — or a daily dosage of 2.5 milligrams — if you ...

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

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

   The key reason: A single dose of tadalafil may provide relief from ED for up to 36 hours — about one and a half days. If we wade into the science for a moment, that means the half-life of ...

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

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

   Viagra (or sildenafil) lasts three to five hours after it’s consumed. Cialis (tadalafil) has a half-life of 17.5 hours, meaning this drug lasts up to 36 hours after it’s consumed.

5. Tadalafil - Wikipedia

   en.wikipedia.org/wiki/Tadalafil

   One advantage Cialis has over Viagra and Levitra is its 17.5-hour half-life (thus Cialis is advertised to work for up to 36 hours, [32] after which time there remains approximately 25% of the absorbed dose in the body) when compared to the four-hour half-life of sildenafil (Viagra).

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

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

   On average, it takes around 30 to 120 minutes for Cialis to start working. Most research suggests that Cialis reaches its peak concentration in your blood after about two hours. Similarly, Viagra ...

7. 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 ...

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

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

   The Best ED Medication for Men: Pros & Cons of Top ED Pills. Over the last 25 years, (ED) medications like Viagra and Cialis have become common fixtures in bedrooms around the world.