Comparative Pharmacology
Head-to-head clinical analysis: CETIRIZINE versus TELDRIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CETIRIZINE versus TELDRIN.
Cetirizine vs TELDRIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Cetirizine is a selective second-generation H1-receptor antagonist that inhibits histamine release from mast cells and basophils, thereby reducing allergic symptoms.
TELDRIN contains loratadine and pseudoephedrine. Loratadine is a long-acting tricyclic antihistamine with selective peripheral H1-receptor antagonism. Pseudoephedrine is a sympathomimetic amine that acts as a decongestant by stimulating alpha-adrenergic receptors in the respiratory tract mucosa, causing vasoconstriction.
10 mg orally once daily; 5 mg orally once daily for mild symptoms
1-2 mg orally twice daily; maximum 4 mg/day.
None Documented
None Documented
Terminal elimination half-life is approximately 8.3 hours in healthy adults; extended to 20 hours in elderly and patients with renal impairment
Clinical Note
moderateCetirizine + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Cetirizine is combined with Fluticasone propionate."
Clinical Note
moderateLevocetirizine + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Levocetirizine."
Clinical Note
moderateLevocetirizine + Erythromycin
"The metabolism of Erythromycin can be decreased when combined with Levocetirizine."
Clinical Note
moderateLevocetirizine + Cyclosporine
Terminal half-life: 9-12 hours (range 8-14) in healthy adults; prolonged in renal impairment.
Primarily renal (60% unchanged in urine); minor biliary/fecal (10%)
Renal: 55-60% unchanged; fecal: 35-40%; minor biliary elimination.
Category A/B
Category C
Antihistamine
Antihistamine
"The metabolism of Cyclosporine can be decreased when combined with Levocetirizine."