Comparative Pharmacology
Head-to-head clinical analysis: CLARINEX D 12 HOUR versus ISOCLOR.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CLARINEX D 12 HOUR versus ISOCLOR.
CLARINEX-D 12 HOUR vs ISOCLOR
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Desloratadine is a long-acting tricyclic histamine antagonist selective for H1-receptor with additional anti-inflammatory properties. Pseudoephedrine is a sympathomimetic amine that acts as a vasoconstrictor via alpha-adrenergic receptors.
Chlorpheniramine is an antihistamine (H1-receptor antagonist) that blocks the action of histamine, reducing allergy symptoms. Pseudoephedrine is a sympathomimetic amine that acts as a decongestant by stimulating alpha-adrenergic receptors, causing vasoconstriction in the nasal mucosa.
1 tablet (5 mg desloratadine / 120 mg pseudoephedrine) orally every 12 hours.
Oral: 1 tablet (chlorpheniramine 4 mg / pseudoephedrine 60 mg) every 4-6 hours, not to exceed 4 tablets per 24 hours.
None Documented
None Documented
Desloratadine: 27 hours (terminal), allows once-daily dosing; pseudoephedrine: 4-6 hours (prolonged in alkaline urine).
Approximately 2-4 hours in patients with normal renal function; prolonged to 8-12 hours in renal impairment (CrCl <30 mL/min).
Desloratadine: 40.2% renal (unchanged and metabolites), 41.7% fecal; pseudoephedrine: 70-90% renal (unchanged).
Primarily renal; approximately 60-70% of a dose excreted unchanged in urine within 24 hours. Biliary/fecal excretion accounts for <10%.
Category C
Category C
Antihistamine/Decongestant Combination
Antihistamine/Decongestant Combination