Comparative Pharmacology
Head-to-head clinical analysis: CHILDREN S ZYRTEC ALLERGY versus FEXOFENADINE HYDROCHLORIDE ALLERGY.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHILDREN S ZYRTEC ALLERGY versus FEXOFENADINE HYDROCHLORIDE ALLERGY.
CHILDREN'S ZYRTEC ALLERGY vs FEXOFENADINE HYDROCHLORIDE ALLERGY
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Cetirizine is a selective antagonist of peripheral H1 histamine receptors, inhibiting histamine-mediated allergic and inflammatory responses.
Fexofenadine is a selective peripheral H1-receptor antagonist that inhibits histamine release from mast cells and basophils.
5 mg (1 tablet or 5 mL oral solution) once daily; dosing frequency may be increased to 10 mg once daily (2 tablets or 10 mL) for more severe symptoms.
60 mg orally twice daily or 180 mg orally once daily.
None Documented
None Documented
Terminal half-life 8.5–10.5 hours in children 2–5 years; 9–11 hours in children 6–12 years; 8–9 hours in adults. Clinically, supports once-daily dosing.
Terminal elimination half-life is 14.4 hours in healthy adults. In renal impairment, half-life may be prolonged up to 59 hours.
Primarily renal (60% unchanged) via tubular secretion; 40% metabolized in liver to inactive metabolites excreted in urine; <1% fecal.
Primarily excreted unchanged in feces (80%) and urine (11%). Biliary excretion contributes to fecal elimination.
Category C
Category A/B
Antihistamine
Antihistamine