Desloratadine Home>Pharmacy>Drugs_and_Medications>D>Desloratadine     Web Pages Desloratadine ( Clarinex ) Information on the predecessor to Claritin, indicated for seasonal and perennial allergic rhinitis and chronic idiopathic urticaria. Clarinex Full prescribing information from RxList. Food and Drug Administration (FDA) - Clarinex Consumer Information Patient FAQ in html format with a link to approved labeling (as pdf).