Clarinex (desloratadine) is a prescription medication used to treat the symptoms associated with seasonal and year-round (chronic) allergies. Seasonal allergies are often caused by exposure to outdoor allergens such as tree pollen, grasses, and weeds while chronic allergies are caused by indoor allergens such as mold, pet dander, and dust mites.
The makers of Clarinex, Shering-Plough, claim that taking this medication in the morning will relieve symptoms all the way into the next morning when one awakes. This is a benefit, since many 24-hour solutions seem to wear off while one is sleeping.
Clarinex helps relieve seasonal and indoor allergy symptoms, as well as chronic hives and itching. It works by blocking histamine -- a chemical in the body that causes sneezing, itching, and irritation when you come into contact with something you're allergic to. Clarinex does not, however, help clear nasal passages. Common side effects, while rare, include nausea, sore throat, and dry mouth.
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