Comparative Pharmacology
Head-to-head clinical analysis: CLARINEX D 24 HOUR versus CYPROHEPTADINE HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CLARINEX D 24 HOUR versus CYPROHEPTADINE HYDROCHLORIDE.
CLARINEX D 24 HOUR vs CYPROHEPTADINE 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.
Cyproheptadine is a potent antihistamine (H1 receptor antagonist) and antiserotonergic agent (5-HT2 receptor antagonist). It also exhibits weak anticholinergic and sedative properties. It blocks histamine-mediated vasodilation, increased capillary permeability, and pruritus, as well as serotonin-mediated effects on appetite and mood.
1 tablet (5 mg desloratadine/120 mg pseudoephedrine) orally once daily
4 mg orally three times daily; range 4-20 mg/day, not to exceed 0.5 mg/kg/day
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 half-life approximately 8–16 hours in adults; may be prolonged in elderly or hepatic impairment.
Desloratadine: ~87% excreted as metabolites (41% urine, 43% feces), <2% unchanged. Pseudoephedrine: ~70-90% excreted unchanged in urine.
Primarily renal (appreciable unchanged drug and metabolites); biliary/fecal elimination minor (<5%).
Category C
Category A/B
Antihistamine/Decongestant Combination
Antihistamine