About ketotifen fumarate
Antihistamine and mast-cell stabilizer
Used for
- Prevention of asthma symptoms in some countries
- Relief of allergic symptoms such as itching and sneezing
Usual adult dose
Usually 1 mg twice daily with food; dosing varies by indication and country.
Usual dose in children
Usually 0.5 mg twice daily for ages 3–17; younger children need weight-based dosing.
Common side effects
- Sleepiness or dizziness
- Dry mouth
- Increased appetite or weight gain
- Irritability, especially in children
Important warnings
- Not for treating an acute asthma attack.
- May cause drowsiness; alcohol and sedatives can worsen it.
- Do not stop existing asthma medicines abruptly.
- Use caution with epilepsy or a history of seizures.
Pregnancy
Use only when clearly needed; pregnancy safety information is limited.
Breastfeeding
Small amounts may enter breast milk; safety information is limited.
Interactions
- Sedatives, sleeping medicines, and alcohol may increase drowsiness.
- Other medicines causing drowsiness may increase impairment.
- Oral diabetes medicines may rarely affect blood-cell counts.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.