Clarinex Side Effects

Common side effects of Clarinex include dizziness, muscle pain, and urinary tract infections. Less common side effects are indigestion, bronchitis, and increased appetite. Among the rare side effects are rapid heart rate, serious allergic reaction, and increased liver enzymes. Inform your healthcare provider if you develop any problems or if anything "just doesn't seem right."

An Introduction to Clarinex Side Effects

As with any medicine, side effects are possible with Clarinex® (desloratadine); however, not everyone who takes the drug will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or can be easily treated by you or your healthcare provider.

 

In previous research studies, up to 2.4 percent of people stopped taking Clarinex because of side effects.

 
(This article covers many, but not all, of the possible side effects with Clarinex. Your healthcare provider can discuss a more complete list of Clarinex side effects with you.)
 

Common Side Effects of Clarinex

Clarinex has been studied extensively in clinical trials. In these studies, side effects are always documented and compared to side effects that occur in a similar group of people not taking the medicine. This way, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.
 
Based on these studies, the most common side effects of Clarinex seen in either adults or children included:
 
  • Nausea -- up to 5 percent
  • Fatigue -- up to 5 percent
  • Sore throat -- up to 4.1 percent
  • Dizziness -- up to 4 percent
  • Urinary tract infection (UTI) -- up to 3.6 percent
  • Muscle pain (myalgia) -- up to 3 percent
  • Dry mouth -- up to 3 percent (see Clarinex and Dry Mouth)
  • Excessive tiredness -- up to 2.1 percent.
     
Other side effects, occurring in more than 2 percent of adults or children, included but were not limited to:
 
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