Comparative Pharmacology
Head-to-head clinical analysis: CHILDREN S CETIRIZINE HYDROCHLORIDE ALLERGY versus CLARINEX D 24 HOUR.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHILDREN S CETIRIZINE HYDROCHLORIDE ALLERGY versus CLARINEX D 24 HOUR.
CHILDREN'S CETIRIZINE HYDROCHLORIDE ALLERGY vs CLARINEX D 24 HOUR
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Cetirizine is a selective antagonist of peripheral histamine H1 receptors. It inhibits the H1 receptor-mediated effects of histamine, reducing symptoms such as pruritus, sneezing, rhinorrhea, and urticaria. It also decreases eosinophil chemotaxis and adhesion molecule expression.
Desloratadine is a long-acting tricyclic histamine antagonist with selective peripheral H1-receptor antagonist activity. Loratadine is a long-acting antihistamine that selectively antagonizes peripheral H1-receptors.
5-10 mg orally once daily; max 10 mg/day. For children's formulation, typical adult dose applies to patients >12 years.
1 tablet (5 mg desloratadine/120 mg pseudoephedrine) orally once daily
None Documented
None Documented
Approximately 8.3 hours (range 6–10 hours) in healthy adults; prolonged in renal impairment (e.g., up to 20 hours).
Desloratadine: terminal t1/2 27 hours (range 20-50h) supporting once-daily dosing. Pseudoephedrine: t1/2 5-8 hours (up to 16h in alkaline urine).
Renal: ~60% unchanged; fecal: ~10%; minor biliary elimination.
Desloratadine: ~87% excreted as metabolites (41% urine, 43% feces), <2% unchanged. Pseudoephedrine: ~70-90% excreted unchanged in urine.
Category A/B
Category C
Antihistamine
Antihistamine/Decongestant Combination