Comparative Pharmacology
Head-to-head clinical analysis: HISTAFED versus TELDRIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: HISTAFED versus TELDRIN.
HISTAFED vs TELDRIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
HISTAFED is a combination of pseudoephedrine, a sympathomimetic amine that acts as a decongestant by stimulating alpha-adrenergic receptors in the nasal mucosa causing vasoconstriction, and triprolidine, a first-generation antihistamine that competes with histamine for H1-receptor sites on effector cells in the gastrointestinal tract, blood vessels, and respiratory tract, thereby preventing histamine-mediated effects.
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.
60 mg orally every 4 to 6 hours as needed; maximum 360 mg per day.
1-2 mg orally twice daily; maximum 4 mg/day.
None Documented
None Documented
3-4 hours for pseudoephedrine component; shorter in children (2-3 h), prolonged in renal impairment
Terminal half-life: 9-12 hours (range 8-14) in healthy adults; prolonged in renal impairment.
Renal (approximately 65% as unchanged drug and metabolites), biliary/fecal (35%)
Renal: 55-60% unchanged; fecal: 35-40%; minor biliary elimination.
Category C
Category C
Antihistamine/Decongestant Combination
Antihistamine