Clarinex-D Side Effects

Common Clarinex-D side effects that require no treatment or that are easily treated include dizziness, sore throat, and excessive tiredness. There are also rare side effects that occur in less than 2 percent of people, although it is difficult to tell whether they are caused by the drug or by other factors. A few of these rare Clarinex-D side effects include increased liver enzymes, serious allergic reaction, and heart palpitations.

An Introduction to Clarinex-D Side Effects

As with any medicine, there are possible side effects with Clarinex-D® (desloratadine and pseudoephedrine); but not everyone who takes Clarinex-D will have side effects. In fact, most people tolerate the drug quite well. When people do develop side effects, in most cases, they are minor, meaning they require no treatment or are easily treated by you or your healthcare provider. In previous research studies, up to 3.6 percent of people stopped taking Clarinex-D 12 Hour® and 3.4 percent of people stopped taking Clarinex-D 24 Hour® because of side effects.
 
(This article covers many, but not all, of the possible side effects with Clarinex-D. Your healthcare provider can discuss a more complete list of Clarinex-D side effects with you.)
 

Common Side Effects of Clarinex-D

Clarinex-D 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. Based on these studies, the most common side effects seen in people taking Clarinex-D 12 Hour included:
 
The most common side effects seen in people taking Clarinex-D 24 Hour included:
 
  • Dry mouth -- up to 8 percent
  • Headache -- up to 6 percent
  • Insomnia -- up to 5 percent
  • Fatigue -- up to 3 percent
  • Excessive tiredness -- up to 3 percent
  • Sore throat -- up to 3 percent
  • Dizziness -- up to 2 percent.
     
Other side effects with Clarinex-D (in either 12 Hour or 24 Hour) that occurred in more than 2 percent of people included but were not limited to:
 
  • Viral infections, such as the common cold or flu
  • Nervousness
  • Nausea
  • Loss of appetite.
     
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Clarinex-D Medicine

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