Comparative Pharmacology
Head-to-head clinical analysis: CHILDREN S ZYRTEC HIVES versus XYZAL.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHILDREN S ZYRTEC HIVES versus XYZAL.
CHILDREN'S ZYRTEC HIVES vs XYZAL
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Cetirizine is a selective antagonist of peripheral histamine H1 receptors, inhibiting histamine-mediated allergic reactions.
Levocetirizine is a selective histamine H1-receptor antagonist; it inhibits the histamine-mediated responses in allergic conditions.
5 mg or 10 mg orally once daily; maximum 10 mg/day.
5 mg orally once daily in the evening.
None Documented
None Documented
Terminal elimination half-life is approximately 8-11 hours in healthy adults, allowing twice-daily dosing.
Terminal elimination half-life is approximately 7 hours in healthy adults; prolonged to 8–11 hours in elderly and in renal impairment.
Cetirizine is primarily excreted renally (~60% unchanged), with ~10% fecal excretion.
Approximately 84% of a dose is excreted renally as unchanged drug; 12% in feces via biliary elimination.
Category C
Category C
Antihistamine
Antihistamine