Zaditen (Ketotifen Fumarate) Shopper Approved

Prescription Prescription Required FormationFormulation: Tablet


(Brand Option)

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Prescription Prescription Required FormationFormulation: Tablet

Ketotifen Fumarate

(Generic Alternative)

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Zaditen (active ingredient: ketotifen) is a prescription medication indicated for:

  • Asthma: Zaditen is used as a preventive treatment for asthma in adults and children aged 3 years and older. It helps to reduce the frequency and severity of asthma attacks by inhibiting the release of certain substances in the body that contribute to inflammation and constriction of the airways.

Zaditen belongs to a class of drugs known as mast cell stabilizers and non-selective histamine receptor antagonists, which work by stabilizing mast cells and inhibiting the effects of histamine, thereby reducing inflammation and bronchoconstriction in the airways.

Use and Dosage

Zaditen is available in oral tablet form, which should be taken exactly as prescribed by your doctor. The tablets can be taken with or without food and should be swallowed whole with a glass of water. Avoid crushing, chewing, or splitting the tablet. Make sure to take Zaditen regularly until your doctor tells you to stop.

The recommended dosages of Zaditen can vary depending on the age and medical condition of the patient. For children over the age of 3, the usual recommended dose is 1 mg twice daily, in the morning and evening. Adults may be prescribed a daily dose of up to 4 mg, but this should be determined by a healthcare provider. Follow the dosage instructions provided by your doctor and do not alter your doses or frequency without consulting them first.

If you have not discussed this with your doctor or are not sure why you are using Zaditen, speak to your doctor. Do not stop giving Zaditen to your child without consulting your doctor. Do not give Zaditen to anyone else, even if they have the same symptoms as your child. It can be harmful for people to use Zaditen if their doctor has not prescribed it.

Side Effects

Common Side Effects of Zaditen (Ketotifen Fumarate):

  • Abdominal pain
  • Dizziness
  • Drowsiness
  • Dry mouth
  • Headache
  • Increased appetite
  • Lightheadedness
  • Nausea
  • Nosebleed
  • Puffy eyelid
  • Rash
  • Respiratory infection
  • Sleep disturbance
  • Trouble sleeping
  • Weight gain

Serious Side Effects of Zaditen (Ketotifen Fumarate):

  • Bloody urine
  • Convulsions
  • Dark urine
  • Fainting
  • Frequent urination
  • Increased thirst
  • Loss of consciousness
  • Palpitations
  • Seizures
  • Severe abdominal pain
  • Skin blisters

Forms and Strength

Zaditen (Ketotifen Fumarate) is available in the following forms and strength:

Zaditen: Tablet

  • 1 mg

Ketotifen Fumarate: Tablet

  • 1 mg


  • Do not use Zaditen if you are allergic to ketotifen or any of the other ingredients in the medication.
  • Zaditen may cause drowsiness or dizziness. Therefore, it is advised not to operate heavy machinery or drive after taking the medication.
  • If you have kidney or liver problems, or are taking other medications, you should consult with your doctor before taking Zaditen.
  • Zaditen may interact with certain medications, such as sedatives or tranquilizers, inform your healthcare provider of all the medications you are currently taking.
  • Zaditen may cause dry mouth, blurred vision, or changes in taste, report any of these side effects to your doctor.
  • Zaditen may interact with alcohol, so it is advised to avoid drinking alcohol while taking the medication.
  • If you are pregnant or breastfeeding, you should consult with your doctor before taking Zaditen.
  • Zaditen may not be appropriate for people with certain medical conditions, such as glaucoma or urinary obstruction, inform your doctor of any pre-existing conditions to determine if Zaditen is safe for you to use.
  • Zaditen may cause drowsiness or impaired coordination, which may be worsened when combined with other medications or alcohol.
  • Zaditen eye drops should not be used while wearing contact lenses and should be applied at least 10-15 minutes before inserting contact lenses. If you wear contact lenses, talk with your doctor before using Zaditen eye drops.

Frequently Asked Questions (FAQ)

Can I take Zaditen with other medications?

Zaditen may interact with certain medications, inform your healthcare provider of all the medications you are currently taking.

Is Zaditen safe for pregnant or breastfeeding women?

If you are pregnant or breastfeeding, consult with your healthcare provider before taking Zaditen.

How long should I take Zaditen?

You should continue taking Zaditen for as long as your doctor prescribes it. Do not alter your dosage or stop taking the medication without consulting your doctor.


Additional information

Generic name:

Ketotifen Fumarate





Quantities Available:



Additional Information Book

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How to Order

How much Zaditen can I order at once from a Canadian pharmacy?

When ordering Zaditen (ketotifen) from a Canadian pharmacy, you can typically purchase up to a 90-day supply at one time, which is standard for prescription medications to ensure continuous treatment without frequent refills.

Here’s what you need to know:

Dosage and Quantity: Zaditen is commonly prescribed in dosages of 1 mg or 2 mg, taken once or twice daily depending on the condition being treated.

For example, if you were prescribed a 1 mg tablet to take twice daily, you would order 180 tablets for a 90-day supply (90 days x 2 tablets per day). If your dosage or frequency differs, adjust the quantity accordingly based on your prescribed regimen.

Do you sell ketotifen?

Yes, we do sell ketotifen on our website, and you can enjoy competitive prices. However, you will need a valid prescription from your healthcare provider to purchase ketotifen from us. We require this prescription to dispense the medication safely and responsibly. You can conveniently provide your prescription by mailing, faxing, or uploading it through your online account during the ordering process.

Do you offer shipping of Zaditen (ketotifen) to the United States?

Yes, we ship Zaditen (ketotifen) to both the United States and Puerto Rico.

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Online Pharmacies Canada has provided information from third parties intended to increase awareness and does not contain all the information about Zaditen (Ketotifen Fumarate). Talk to your doctor or other qualified medical practitioners for medical attention or advice, or if you have any concerns about Zaditen (Ketotifen Fumarate).