
Clarinex is widely used and popular because of its non-drowsy characteristic. Many antihistamines tell users to avoid machinery or driving while taking it, but Clarinex does not. This drug was also the first to boast that grapefruit juice did not affect its absorption.

Do not use any other over-the-counter cold, allergy, or sleep medication without first asking your doctor or pharmacist. If you take certain products together you may accidentally take too much of a certain drug. Read the label of any other medicine you are using to see if it contains an antihistamine or decongestant.

There may be other drugs not listed that can affect desloratadine and pseudoephedrine. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

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