KetotifenPrices, Coupons & Savings

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*Based on the difference between the U&C price submitted and the price the patient paid, as of April 2023.

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  1. Medication
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  2. Ketotifen Fumarate
    Generic for Zaditor
    5mL ophthalmic solutions $11.09 USD
    Save $3.82
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Do you need a prescription for ketotifen?

Yes, ketotifen is only available with a valid physician Rx.

How much is ketotifen without Insurance in the US?

Our website gives two competitive savings options to US customers who wish to purchase ketotifen, as either a brand or generic, if available. The first is access to medications through our mail-order online pharmacy. The second is by using the Now Patient Rx Advantage Card, which can be used in over 65,000 pharmacies nationwide, across America. If you are insured, then in most cases, the cash price will be significantly cheaper than the copay.

What will my out-of-pocket cost be for ketotifen in the US?

There are no out-of-pocket (OOP) costs because we are currently only offering a cash-based option to purchase medications.

Is Now Patient a ketotifen savings card?

Yes. Save up to 90% on your ketotifen with the FREE Now Patient Rx Advantage card*.
*Based on the difference between the U&C submitted by the pharmacy and the price the patients pay.

Can you handle Rx transfers for home delivery in the US?

Yes. If you use the mail-order online pharmacy option, then we can handle requests by you to have your prescription transferred to our pharmacy for home delivery. We can even help you manage your refills by giving you timely reminders, so you do not run out of your medication.

Is Now Patient a ketotifen coupon provider in the US?

No. Now Patient does not provide ketotifen coupons or FREE ketotifen samples.

Do you accept commercial, Medicare or Medicaid coverage for ketotifen in the US?

No. Currently, we only offer cash-based options for purchase, therefore we do not require your insurance benefit details. In the future, our plan is to be able to handle commercial insurance, Medicare and Medicaid including cases where you have multiple health plans that provide benefit coverage (e.g. Medicaid and Commercial). We also anticipate being able to handle more complex scenarios such as using primary insurance combined with a manufacturer copay assistance program.

Does Now Patient work with Medicare?

Our cash-based prices for medications are typically cheaper than Medicare copays. We do not bill Medicare Part D (standalone drug coverage) or Medicare Advantage (combined health and drug coverage). When you purchase your medication from Now Patient, you will be doing so out of your pocket. The spend will not count towards your plan deductibles or gaps.

Does Now Patient work with Commercial Insurance?

Our cash-based prices for medications are typically cheaper than commercial plan copays. We do not bill your commercial plan. When you purchase your medication from Now Patient, you will be doing so out of your pocket. The spend will not count towards your plan deductibles or gaps.

What should you do if you use too much ketotifen?


Call your doctor right away or seek immediate medical attention if your symptoms do not improve or they become worse after using ketotifen. You can also call 800-222-1222 to reach the American Association of Poison Control Centers or use its online resource if you think you’ve used too much ketotifen. But if you have severe symptoms, call 911 (or your local emergency number) immediately or go to the nearest emergency room.


If you think it is an emergency, call 999 or find your nearest A&E
If you need help now, but it’s not an emergency go to 111.nhs.uk or call 111. Alternatively you can speak to one of our pharmacists or use the Now Patient app to make an appointment with your GP.

What should I do if I miss my dose?

There are occasions when people forget to take their medication at correct prescribed times. This may not only have an effect on potentially making the medication less effective but it may also inadvertently lead to taking doses too close together, thereby increasing the risks of side effects.

Click here to find out what to do if you forgot to take your medication

What is generic Ketotifen?

Generic ketotifen refers to the non-brand-name version of the medication. It contains the same active ingredient as the brand-name drug but is typically less expensive.

FDA approval of ketotifen

Ketotifen is approved by the U.S. Food and Drug Administration (FDA) for the treatment of allergic conjunctivitis, a condition that causes redness and itching of the eyes due to allergies.

Active ingredient of ketotifen

The active ingredient of ketotifen is ketotifen fumarate.

US brand name of ketotifen and manufacturer

Ketotifen is available in the US under the brand name Zaditor. It is manufactured by various pharmaceutical companies.

UK brand name of ketotifen and manufacturer

In the UK, ketotifen is available under various brand names, including Zaditen. The manufacturer may vary depending on the brand name.

Prescription requirement for ketotifen

A prescription (Rx) is not typically required for ketotifen in the US. It is available over-the-counter as an eye drop. However, in some cases, a prescription may be required for higher strength or oral formulations. In the UK, ketotifen is available as a pharmacy-only medicine.

Availability of ketotifen in the UK with NHS prescription

Ketotifen is available in the UK with an NHS prescription for higher strength or oral formulations.

Conditions treated by ketotifen

Ketotifen is a histamine H1 receptor blocker and mast cell stabilizer. In its ophthalmic form, it is used to treat allergic conjunctivitis, a common condition caused by allergens such as pollen, dust mites, or pet dander. It helps relieve symptoms such as redness, itching, and watering of the eyes. Oral ketotifen has been used for the treatment of asthma attacks, allergic rhinitis, allergic conjunctivitis, urticaria, and food allergy.

How does ketotifen work?

Ketotifen works by blocking the release of certain substances in the body that are involved in allergic reactions. It helps prevent the activation of mast cells, which release histamine and other inflammatory mediators, leading to allergy symptoms.

Forms of ketotifen available

Ketotifen is available in the form of ophthalmic solution eye drops and oral tablets.

Dosage of ketotifen

The dosage of ketotifen may vary depending on the specific condition being treated and the formulation used. If you forget to use the eye drops, instill the missed dose as soon as you can. If it is however, almost time for your next dose, skip the missed dose and use the eye drops at the next planned time. It is important to follow the drug information provided by the healthcare provider or the instructions on the product label for over-the-counter use.

Directions for ketotifen use

When using ketotifen eye drops, wash your hands before applying the drops. Tilt your head back and pull down the lower eyelid to create a small pocket. Hold the dropper above the eye, without touching it, and squeeze the prescribed number of drops into the pocket. Close your eyes gently and press the inner corner of your eye with your finger for about 1 minute to prevent the medication from draining out. Repeat the process for the other eye if instructed to do so. For oral administration of tablets, follow the instructions provided by the healthcare provider or the product label.

Warnings and precautions for ketotifen

  • Ketotifen eye drops are for external use only and should not be ingested. If ingested accidentally, seek medical attention
  • Do not wear contact lenses when being treated with ketotifen
  • Ketotifen may contain the preservative benzalkonium chloride, which can cause allergic reactions
  • Ketotifen may cause temporary blurred vision after applying the eye drops. Avoid activities that require clear vision until your vision is clear again
  • If you experience any eye infection or injury while using Ketotifen eye drops, discontinue use and consult a healthcare provider

Use of ketotifen during pregnancy

The use of ketotifen during pregnancy should be carefully considered, and the potential risks and benefits should be discussed with a healthcare professional.

Use of ketotifen while breastfeeding

It is not known whether ketotifen passes into breast milk. It is recommended to consult a healthcare provider before using ketotifen while breastfeeding.

Possible side effects of ketotifen

In clinical trials common side effects of ketotifen eye drops may include temporary stinging or burning sensation in the eyes, and eye pain. Common side effects of oral ketotifen may include drowsiness, sedation, dry mouth, weight gain, and gastrointestinal disturbances. Serious side effects are rare but can occur. Promptly report any adverse effects to a healthcare provider.

Interactions with other drugs

Ketotifen may interact with certain medications. It is important to inform your healthcare provider about all the medications you are taking, including prescription drugs, nonprescription over-the-counter (OTC) drugs, dietary supplements, multivitamins, and herbal products, to avoid any adverse events and potential drug interactions.

Similar drugs to ketotifen

Other antihistamine medications used for the treatment of allergic conjunctivitis include olopatadine and azelastine.


Stefano Mirabello Medical Reviewer
Pharmacist / B.Pharm
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