Identification | Back Directory | [Name]
Cetirizine-d8 (hydrochloride) | [CAS]
2070015-04-0 | [Synonyms]
Cetirizine-d8 DiHCl Cetirizine-d8 (hydrochloride) [2H8]-Cetirizine Dihydrochloride | [Molecular Formula]
C21H18Cl2D8N2O3 | [MOL File]
2070015-04-0.mol | [Molecular Weight]
433.398 |
Hazard Information | Back Directory | [Description]
Cetirizine-d8 (hydrochloride) is intended for use as an internal standard for the quantification of cetirizine , (R)-cetirizine , and (S)-cetirizine by GC- or LC-MS. Cetirizine is a bioactive carboxylated metabolite of hydroxyzine that acts as a selective histamine H1 receptor antagonist (Ki = 10 nM). As a second generation antihistamine, it is non-sedating due to low lipophilicity, which prevents blood-brain barrier transit. Cetirizine is a racemic mixture composed of equal amounts of two enantiomers, (R)-cetirizine and (S)-cetirizine, with pharmacological activity residing primarily in the (R) isomer. Cetirizine inhibits eosinophil chemotaxis and leukotriene B4 (LTB4; ) release independent from H1 antagonism. It inhibits aerosol histamine-induced bronchospasm in guinea pigs (ED50 = 100 μg/kg, p.o.). Formulations containing cetirizine have been used in the treatment of allergic rhinitis and chronic urticaria. | [Uses]
A nonsedating type histamine H1-receptor antagonist. A major metabolite of Hydroxyzine. Pharmacological activity resides primarily in the (R)-isomer. Antihystaminic. |
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