Active Ingredient

Ketotifen

Ketotifen is an antihistamine that helps to relieve allergy symptoms. It is often used in situations where allergic reactions cause discomfort.

This medication may be recommended for people experiencing symptoms related to allergies, such as itchy eyes or sneezing.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Ketotifen Brands

Strengths 1mg

Ketotifen is typically used to manage and prevent symptoms associated with allergies.

Ketotifen works by blocking histamine receptors in the body, which helps to reduce allergic reactions.

Histamine is a chemical in the body that causes symptoms like itching, swelling, and redness during an allergic response.

By preventing histamine from binding to its receptors, Ketotifen helps to alleviate these symptoms.

Not everyone will experience side effects, and many are mild and temporary.

If you experience serious or persistent symptoms, contact your doctor.

What does Ketotifen do?

Ketotifen helps to relieve allergy symptoms by blocking histamine receptors, reducing allergic reactions.

How long does it take for Ketotifen to work?

The effects of Ketotifen may be noticed within a few hours, but it may take several days for full benefits to be seen.

Is Ketotifen safe for long-term use?

Ketotifen is generally considered safe for long-term use under medical supervision. Always follow your doctor’s advice.

Can I take Ketotifen with other medications?

It’s important to inform your doctor about any other medications you are taking, as Ketotifen can interact with certain drugs.

Can I drink alcohol while taking Ketotifen?

It’s advisable to limit alcohol consumption, as it can increase the drowsiness effect of Ketotifen.