Comparative Pharmacology
Head-to-head clinical analysis: ACTAHIST versus CLARINEX D 24 HOUR.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ACTAHIST versus CLARINEX D 24 HOUR.
ACTAHIST vs CLARINEX D 24 HOUR
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Antihistamine; binds to histamine H1 receptors, blocking the effects of histamine; also exhibits anticholinergic and mild sedative properties.
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.
1.34 mg (one capsule) orally twice daily.
1 tablet (5 mg desloratadine/120 mg pseudoephedrine) orally once daily
None Documented
None Documented
6.9 ± 1.7 hours in adults; prolonged to 12-18 hours in elderly or patients with hepatic impairment, requiring dosing interval adjustment.
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).
Primarily renal (approximately 85% as unchanged drug and metabolites) and fecal (15%) via biliary elimination.
Desloratadine: ~87% excreted as metabolites (41% urine, 43% feces), <2% unchanged. Pseudoephedrine: ~70-90% excreted unchanged in urine.
Category C
Category C
Antihistamine
Antihistamine/Decongestant Combination