Prior to the approval of Clarinex in the United States, numerous clinical studies were conducted in over 4,000 adults and children. This included studies looking at the effects of Clarinex on seasonal allergy symptoms, perennial allergy symptoms, and chronic urticaria. In these studies, people taking the drug had improved relief, compared to the group of people not taking the medicine.
Desloratadine and pseudoephedrine can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
Clarinex is classified as an antihistamine. This means its method of action is to block the effects of histamine, a natural substance in your body released by an overactive immune system during an allergic reaction. An allergic reaction occurs when your body inadvertently reacts to substances it views as harmful. These substances are called allergens.
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