Comparative Pharmacology
Head-to-head clinical analysis: ALCAFTADINE versus EMADINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ALCAFTADINE versus EMADINE.
ALCAFTADINE vs EMADINE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Selective histamine H1 receptor antagonist; inhibits histamine release from mast cells and reduces ocular itch associated with allergic conjunctivitis.
Emedastine is a selective histamine H1 receptor antagonist that inhibits histamine-induced vascular permeability, edema, and pruritus.
1 drop of 0.25% ophthalmic solution in each affected eye twice daily.
1 drop of 0.05% ophthalmic solution in the affected eye(s) twice daily, approximately 8 hours apart.
None Documented
None Documented
Terminal elimination half-life is approximately 2 hours (range 1.5–3 h) after topical ocular administration, appropriate for twice-daily dosing.
Clinical Note
moderateAlcaftadine + Betahistine
"The therapeutic efficacy of Betahistine can be decreased when used in combination with Alcaftadine."
Clinical Note
moderateAmphetamine + Alcaftadine
"Amphetamine may decrease the sedative activities of Alcaftadine."
Clinical Note
moderateDiethylpropion + Alcaftadine
"Diethylpropion may decrease the sedative activities of Alcaftadine."
Clinical Note
moderatePhentermine + Alcaftadine
Terminal elimination half-life: 4–6 hours; clinically, dosing every 4–6 hours as needed for symptom relief
Primarily renal (approximately 50% unchanged), with the remainder as metabolites; negligible biliary/fecal elimination.
Renal: approximately 60% as unchanged drug and metabolites; fecal: approximately 15%
Category C
Category C
Ophthalmic Antihistamine
Ophthalmic Antihistamine
"Phentermine may decrease the sedative activities of Alcaftadine."