Comparative Pharmacology
Head-to-head clinical analysis: CLARINEX D 24 HOUR versus MECLIZINE HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CLARINEX D 24 HOUR versus MECLIZINE HYDROCHLORIDE.
CLARINEX D 24 HOUR vs MECLIZINE HYDROCHLORIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
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.
Meclizine is a histamine H1 receptor antagonist that acts centrally in the vestibular system to suppress nausea and vomiting. It also has anticholinergic and sedative effects.
1 tablet (5 mg desloratadine/120 mg pseudoephedrine) orally once daily
25-50 mg orally, 3 to 4 times daily for vertigo; 25-50 mg orally 1 hour before travel, may repeat every 24 hours as needed for motion sickness.
None Documented
None Documented
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).
Terminal elimination half-life: 6 hours (range 5-10 hours). Clinical context: Supports twice-daily dosing; steady-state achieved in approximately 24 hours.
Desloratadine: ~87% excreted as metabolites (41% urine, 43% feces), <2% unchanged. Pseudoephedrine: ~70-90% excreted unchanged in urine.
Renal (unchanged and metabolites): 50%; fecal: 40%; biliary: 10%
Category C
Category A/B
Antihistamine/Decongestant Combination
Antihistamine