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Compare Olopatadine vs. Zaditor

Head-to-head comparisons of medication uses, side effects, warnings, and more.

Key takeaways

Olopatadine (Pataday) and ketotifen (Zaditor) are both over-the-counter antihistamine eye drops used to treat allergy-related eye symptoms, but they have some differences. Olopatadine can be used by people as young as 2 years old, while ketotifen is for those 3 years and older. Olopatadine comes in different strengths and can be used once or twice daily depending on the formulation, whereas ketotifen is typically used twice daily. Olopatadine may work faster to relieve symptoms and has fewer side effects compared to ketotifen. Both medications require you to remove contact lenses before use and wait at least 10 minutes before putting them back in. Ketotifen should not be used for more than 3 days in a row without consulting a provider, while olopatadine can be used for year-round allergies. Both medications are available as lower-cost generics.

  • Olopatadine (Pataday)
    Zaditor (ketotifen)
  • Olopatadine (Pataday)
    Zaditor (ketotifen)

  • Summary of Olopatadine vs. Zaditor

    Summary for Antihistamine

    Olopatadine (Pataday) is an antihistamine over-the-counter (OTC) eye drop medication used to treat eye itching and redness from allergies. It's applied to the eyes, typically once or twice daily, depending on the strength. Some side effects of olopatadine (Pataday) include blurry vision and dry eye.

    Summary for Antihistamine

    Zaditor (ketotifen) is an antihistamine eye drop that's available over the counter for allergy-related itchy eyes. It works by blocking histamine and stopping your body from releasing chemicals that cause allergy symptoms. Adults and children can use Zaditor (ketotifen). The typical dosage is one drop into the affected eye(s) twice daily. Side effects can include headache, blurry vision, and dry eyes.

  • Indications of Olopatadine vs. Zaditor

    Indications for
    •Temporary relief of allergy eye symptoms, such as itching and redness
    Indications for
    •Allergy-related itchy eyes

  • Pros and Cons of Olopatadine vs. Zaditor

    Pros and Const for Antihistamine
    Pros
    •Works within minutes and lasts up to 24 hours, depending on the strength
    •Can be used in children over 2 years old
    •Available over the counter
    Cons
    •Can't wear contacts for 10 minutes after using
    •Not for itching caused by infections or contact lenses
    •Might contain preservatives
    Pros and Const for Antihistamine
    Pros
    •Works within 15 minutes to relieve itchy eyes
    •Available over the counter
    •Can use in children age 3 or older
    •Only need to use 1 drop twice a day
    Cons
    •Won't treat an eye infection
    •Shouldn't be used for irritation caused by contact lenses
    •Can only be used for a short period of time
    •Need to take your contact lens out before placing the eye drop

  • Common Side Effects of Olopatadine vs. Zaditor

    Common Side Effects for
    •Blurry vision (5%)

    Note: These side effects were noted by people using olopatadine eye drops 0.77% in clinical studies.

    Common Side Effects for
    •Headache
    •Runny nose
    •Rash
    •Dry eye

  • Warnings of Olopatadine vs. Zaditor

    Common Side Effects for
    •For use in the eyes only
    •Risk for bacterial infections in the eye when using contaminated medication
    •Don't use while wearing contact lenses
    Common Side Effects for
    •Not to be used with contact lenses
    •Allergy to ingredients
    •Risk for eye infection

  • Prices with our coupons for Olopatadine vs. Zaditor

    Learn more about Olopatadine
    Learn more about Zaditor

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