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Cialis (tadalafil) is an oral drug, used for treating male impotence, also known as erectile men's erectile dysfunction (ED).
Cialis has been studied extensively in clinical trials, with over 5,700 people having been evaluated. In these studies, side effects are always documented. Based on these studies, common Cialis side effects, occurring in more than 2 percent of people, include:
* Headache - up to 15 percent of people
* Facial flushing - up to 3 percent of people
* Indigestion, known as dyspepsia - up to 10 percent of people
* Back pain - up to 6 percent of people
* Nasal congestion - up to 3 percent of people
* Muscle pain (known as myalgia) - up to 4 percent of people
* Pain in the arms or legs - up to 3 percent of people.
In rare instances, men taking Cialis ED tablets reported a sudden decrease or loss of vision or hearing (sometimes with ringing in the ears and dizziness). It's not possible to determine if these events are related directly to the ED tablets or to other factors. If you have a sudden decrease or loss of vision or hearing, stop taking Cialis, and call your doctor right away.
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