Prescription or OTCLower-cost generic availableClass: Ophthalmic


(ketotifen fumarate)

Prescription or OTCLower-cost generic availableClass: Ophthalmic
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Soothes itchy eyes.

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Our bottom line

Zaditor (Ketotifen Fumarate) is strong medicine for itchy eyes and doesn't expose the rest of your body to the medicine.

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  • Works fast to relieve itchy eyes caused by allergies.
  • Most people don't have many side effects since it works in your eyes and doesn't affect the rest of your body.
  • It's available over the counter in the drugstore.


  • Doesn't treat for other types of allergy symptoms.
  • You need to have good hand-eye coordination to get the eye drops into your eyes.
How it works

Zaditor (Ketotifen Fumarate) is a topical antihistamine and mast cell stabilizer. It blocks your body's reaction to allergens that irritate the eye.

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Side effect rates for Zaditor (ketotifen fumarate)

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These are side effects of Zaditor (ketotifen fumarate) reported to the FDA by people taking it, and by doctors and pharmacists.
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Common concerns from people taking Zaditor (ketotifen fumarate)

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