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Torrent Pharmaceuticals Ltd - 100 G
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Ketotifen (1mg)
Delivery across India. Free above ₹999; ₹49 from ₹499, ₹99 below. Chennai express delivery is chargeable.
This medicine needs a prescription.
You can pay now and add the prescription afterwards. We pack your order only after a pharmacist verifies it.
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Asthafen Tablet is used for asthma Allergic eye disease.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
Asthafen Tablet contains Ketotifen (1mg). It belongs to the Antihistamine / leukotriene antagonist class of medicines.
Asthma Allergic eye disease
Asthafen Tablet works by blocking the release of certain chemical messengers (histamine, leukotrienes) that may cause inflammation, spasms of muscles of the airways, and other symptoms of asthma and eye allergies.
Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Asthafen Tablet may be taken with or without food.
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
If you miss a dose of Asthafen Tablet, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule. Do not double the dose.
An overdose of this medicine can cause severe drowsiness, a fast heartbeat, confusion and, in children, agitation and fits. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.
Most side effects of Asthafen are mild and settle as the body adjusts. Reported side effects include:
Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.
| Pregnancy | Pregnancy CONSULT YOUR DOCTOR |
|---|---|
| Breastfeeding | Breast feeding CONSULT YOUR DOCTOR |
| Alcohol | Alcohol UNSAFE |
| Driving | Driving UNSAFE |
| Kidney | Kidney CONSULT YOUR DOCTOR |
| Liver | Liver CONSULT YOUR DOCTOR |
| Habit forming | No |
Older antihistamines cause marked drowsiness — do not drive or operate machinery until you know how this affects you. Tell your doctor promptly about any change in mood, sleep, agitation or unusual thoughts while taking montelukast; this is uncommon but recognised. This relieves the symptoms of an allergy; it does not treat the cause, and it is not a treatment for an acute asthma attack. Seek emergency care for swelling of the lips, tongue or throat, or difficulty breathing.
Not for anyone with a known allergy to this medicine or to any ingredient in the pack. The sedating antihistamines are not suitable for very young children, or for people with glaucoma or an enlarged prostate, without medical advice.
Alcohol, sleeping tablets and other sedating medicines add to the drowsiness. Tell your doctor about all cold and cough preparations — many already contain an antihistamine.
Store below 30°C in the original pack, away from direct sunlight and moisture. Keep out of the reach of children.
Asthafen Tablet can cause drowsiness or dizziness in some individuals. Avoid driving or operating heavy machinery until you know how it affects you. Long-term use of Asthafen Tablet may lead to increased appetite and weight gain, so maintain a balanced diet and active lifestyle. Asthafen Tablet stabilizes mast cells, reducing eye itching, redness, and irritation caused by allergies. However, it does not treat infections, so avoid using it for bacterial or viral eye issues.

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The information on Asthafen Tablet is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.