By Medically reviewed by Hello Doktor Medical Panel


What is Ketasma® (ketotifen) used for?

Ketasma® comes as an oral form, which is commonly used for treating bronchial asthma or preventing asthma attack, particularly in children with mild atopic asthma.

It is also used to treat allergic reactions, such as allergic rhinitis and conjunctivitis, to relieve symptoms, e.g., nasal congestion, runny itchy nose, sneezing, tearing, and itchy, red, and puffy eyes.

How should I take Ketasma® (ketotifen)?

Swallow whole tablet with a glass of water twice daily and with food.

The dose you take and for how long will depend on what you are being treated for and your doctor’s recommendations.

You should see an improvement within 4-6 weeks and continue to take tablet for at least 2-3 months, depending on your doctor’s recommendations.

How do I store Ketasma® (ketotifen)?

Ketasma® is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Ketasma® in the bathroom or the freezer. There may be different brands of Ketasma® that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush Ketasma® down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Ketasma® (ketotifen)?

Before using this drug, tell your doctor your medical history, including allergies (especially drug allergies).

Limit alcohol intake as this might aggravate drug side effects.

Caution performing tasks requiring alertness (e.g., driving).

Lowering the dose must be done carefully under doctor and pharmacist supervision.

Is it safe during pregnancy or breastfeeding?

There are no adequate studies in women for determining risk when using this medication during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking this medication. This medication is pregnancy risk category C, according to the US Food and Drug Administration (FDA).

FDA pregnancy risk category reference below:

  • A=No risk
  • B=No risk in some studies
  • C=There may be some risk
  • D=Positive evidence of risk
  • X=Contraindicated
  • N=Unknown

Side effects

What side effects can occur from Ketasma® (ketotifen)?

Drowsiness, dizziness, trouble sleeping or flu- like symptoms might occur. If these persist or worsen, notify your doctor.

Contact your doctor immediately if you notice some unlikely side effects, such as:

  • Unusual weight gain
  • Stomach pain
  • Rash
  • Unusual bleeding or bruising
  • Irritability
  • Unusual excitability or nervousness

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.


What drugs may interact with Ketasma® (ketotifen)?

Ketasma® may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Drugs causing a serious reaction with Ketasma® are oral antidiabetic medications, which may cause reversible thrombocytopenia, sedatives or other sedating antihistamines.

Does food or alcohol interact with Ketasma® (ketotifen)?

Ketasma® may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with Ketasma® (ketotifen)?

Ketasma® may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.


The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using Ketasma® (ketotifen).

What is the dose of Ketasma® (ketotifen) for an adult?

Take Ketasma® tablets 1mg twice daily.

You should continue to take for at least 2-3 months, depending on your doctor’s recommendations.

What is the dose of Ketasma® (ketotifen) for a child?

Take Ketasma® tablets 1mg twice daily.

You should continue to take for at least 2-3 months, depending on your doctor’s recommendations.

How is Ketasma® (ketotifen) available?

Ketasma® is available in the following dosage forms and strengths:

  • Ketasma® tablets 1mg

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of Ketasma®, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

Hello Health Group does not provide medical advice, diagnosis or treatment.

msBahasa Malaysia

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Review Date: April 1, 2017 | Last Modified: December 19, 2019

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