Antihistamine / Mast cell stabilizer (Antiallergy)
Last reviewed April 2026
Who is this for?
Ketotifen is an antiallergy medicine that works by blocking histamine — the chemical your body releases during allergic reactions — and also helps stabilize certain cells in your body to prevent them from releasing more allergy-causing substances.
Available Over The Counter
Get this from any pharmacy or chemist — no prescription needed.
Explore this drug