Best non sedating antihistamine
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[ Read the disclaimer | Adults: Allergic rhinitis, seasonal/perennial: 5 mg po qd. In patients with liver or renal impairment, a starting dose of one 5 mg tablet every other day is recommended based on pharmacokinetic data.
Seasonal allergic rhinitis: 60 mg orally twice daily or 180 mg once daily.
A dose of 60 mg once daily is recommended as the starting dose in patients with decreased renal function Mechanism of Action Fexofenadine hydrochloride, the major active metabolite of terfenadine, is an antihistamine with selective peripheral H1-receptor antagonist activity.
Both enantiomers of fexofenadine hydrochloride displayed approximately equipotent antihistaminic effects.
Results of a radiolabeled tissue distribution study in rats and a radioligand H1-receptor binding study in guinea pigs showed that desloratadine did not readily cross the blood brain barrier. Dosing: Oral: Children: 6-11 months: 1 mg once daily 12 months to 5 years: 1.25 mg once daily 6-11 years: 2.5 mg once daily Children /= 12 years and Adults: 5 mg once daily Supplied Syrup (Clarinex®): 0.5 mg/m L (480 m L) [bubble gum flavor] Tablet (Clarinex®): 5 mg Tablet, orally-disintegrating (Clarinex® Redi Tabs®): 5 mg [contains phenylalanine 1.75 mg/tablet] Adult (usual) Chronic idiopathic urticaria: 60 mg orally twice daily.The authors make no claims of the accuracy of the information contained herein; and these suggested doses are not a substitute for clinical judgment. nor any other party involved in the preparation of this program shall be liable for any special, consequential, or exemplary damages resulting in whole or part from any user's use of or reliance upon this material.PLEASE READ THE DISCLAIMER CAREFULLY BEFORE ACCESSING OR USING THIS SITE.The clinical significance of these findings is unknown.
Mechanism of Action Desloratadine is a long-acting tricyclic histamine antagonist with selective H1-receptor histamine antagonist activity.
Receptor binding data indicate that at a concentration of 2–3 ng/m L (7 nanomolar), desloratadine shows significant interaction with the human histamine H1-receptor.