Comparative Pharmacology
Head-to-head clinical analysis: BENADRYL versus CHILDREN S CETIRIZINE HYDROCHLORIDE HIVES RELIEF.
Peer-Reviewed Evidence
Head-to-head clinical analysis: BENADRYL versus CHILDREN S CETIRIZINE HYDROCHLORIDE HIVES RELIEF.
BENADRYL vs CHILDREN'S CETIRIZINE HYDROCHLORIDE HIVES RELIEF
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Antihistamine; inverse agonist at histamine H1 receptors, blocking histamine-induced vasodilation, increased capillary permeability, and bronchoconstriction; also anticholinergic and sedative.
Cetirizine is a selective histamine H1-receptor antagonist. It inhibits the H1 receptor, reducing histamine-mediated effects such as edema, flare, and pruritus.
25-50 mg orally every 4-6 hours as needed; maximum 300 mg per day. Alternatively, 10-50 mg intramuscularly or intravenously once, maximum 100 mg per dose (IV route preferred).
5 mg or 10 mg orally once daily; maximum 10 mg per day.
None Documented
None Documented
Terminal elimination half-life 4-8 hours; prolonged in hepatic impairment (up to 20 hours).
Terminal elimination half-life is approximately 8.3 hours in healthy adults; prolonged to ~20 hours in renal impairment (CrCl <30 mL/min).
Renal (90% as metabolites, <5% unchanged); minimal biliary/fecal.
Approximately 70% of the dose is excreted unchanged in urine via glomerular filtration and tubular secretion; about 10% is eliminated in feces.
Category C
Category A/B
Antihistamine
Antihistamine