Allergies Home > Clarinex Syrup

Clarinex® (desloratadine) is a prescription medication used to treat allergies and hives in adults and children. It is part of a class of drugs called antihistamines. As the name implies, the drug blocks the effects of histamine. This can help with relief of allergy symptoms. However, because histamine is not involved with nasal congestion, Clarinex will not help open the nasal passages.
Clarinex is available in several strengths and forms. They include:
  • Clarinex tablets: 5 mg
  • Clarinex RediTabs® (orally disintegrating tablets): 2.5 mg and 5 mg
  • Clarinex syrup: 2.5 mg/5 mL, each teaspoon (5 mL) contains 2.5 mg.
Although most people tolerate this medication well, side effects are possible. Some of the common side effects include fatigue, nausea, and a sore throat. Because Clarinex is not suitable for everyone, make sure to talk to your healthcare provider about any other medical conditions you may have, as well as any other medications you are taking (including vitamins and herbal supplements).
(Click Clarinex for a more in-depth look at how adults and children may treat hives or allergies with the tablet, RediTab, or syrup forms of Clarinex. This article also discusses potential side effects, general dosing guidelines, and safety precautions.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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