Ketotifen fumarate
Allergy · OTC
Trade namesZaditor, Alaway, Claritin Eye
Drug classAntihistamine + mast-cell stabilizer (dual-acting)
Strength0.025%
AvailabilityOTC
Mechanism of actionH1-antagonist with mast-cell stabilization and eosinophil suppression.
Indication / reason for useItching due to allergic conjunctivitis; widely used first-line OTC agent.
Usual adult dosing1 drop in each eye every 8-12 h.
PreservativeBAK 0.01%
Contact lensesRemove lenses; reinsert after 10 min.
Common / important adverse effectsBurning/stinging, conjunctival injection, headache, dry eye.
Contraindications & cautionsHypersensitivity.
Pregnancy / lactationLimited data; acceptable when needed.
Practice notesInexpensive, effective, a reasonable default recommendation.
Chair-side reference only. Dosing, contraindications and pregnancy guidance here are not exhaustive. Confirm against the current prescribing information and the patient’s full history before prescribing or advising.