
Acetamide 250
Micro Labs - 10 S
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Prescription required
Levocetirizine dihydrochloride 2.5 mg + Montelukast 4 mg per 5 mL (common formulation; verify pack label)
Delivery across India. Free above ₹999; ₹49 from ₹499, ₹99 below. Chennai express delivery is chargeable.
This medicine needs a prescription.
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Allercet M Syrup is used for allergic rhinitis (sneezing, runny/blocked nose, itchy/watery eyes), allergy-related cough/wheeze and prevention of allergy-triggered asthma symptoms.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
Allercet M Syrup contains Levocetirizine dihydrochloride 2.5 mg + Montelukast 4 mg per 5 mL (common formulation; verify pack label). It belongs to the Second-generation H1 antihistamine + Leukotriene receptor antagonist class of medicines.
Levocetirizine is an H1-antihistamine that blocks histamine to relieve sneezing, itching and runny nose. Montelukast is a leukotriene receptor antagonist that reduces airway/allergic inflammation and helps prevent wheeze and nasal symptoms.
Oral syrup; take the measured dose using a measuring cup/spoon, usually once daily (often in the evening) or as prescribed. Can be taken with or without food; shake well before use.
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
Take the missed dose of Allercet M as soon as you remember. If it is almost time for the next dose, skip the missed one and carry on with the usual schedule. Do not take two doses together to make up for a missed dose.
Taking more Allercet M than prescribed can be harmful. If you suspect an overdose, contact a doctor or go to the nearest emergency department at once, and carry the pack or strip with you. In India the emergency number is 112.
Most side effects of Allercet M 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 | Consult doctor (use with caution; generally avoided unless clearly needed) |
|---|---|
| Alcohol | Use with caution (may increase drowsiness) |
| Habit forming | No |
May cause drowsiness—avoid driving/alcohol if affected. Use with caution in kidney disease (levocetirizine dose adjustment may be needed). Montelukast has been associated with mood/behavior changes (agitation, sleep disturbances, depression, suicidal thoughts); stop and seek medical help if these occur. Not for sudden acute asthma attack; keep rescue inhaler as advised. Use in children only as per age-appropriate dose prescribed.
Alcohol and other CNS depressants (increased drowsiness), sedating antihistamines, other leukotriene antagonists (duplicate therapy). Rifampicin/phenobarbital/phenytoin may reduce montelukast effect. Theophylline may lower montelukast levels slightly.
Store below 25°C, protect from light and moisture. Keep bottle tightly closed; do not freeze. Keep out of reach of children.
Medicines with the same active ingredient (Levocetirizine dihydrochloride 2.5 mg + Montelukast 4 mg per 5 mL (common formulation; verify pack label)). Ask your doctor or pharmacist before switching brands.
| Medicine | Pack | Price | vs Allercet M Syrup |
|---|---|---|---|
| Akair Lc SyrupJB CHEMICALS | syrup · 60ML | ₹130 | 21% more |

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The information on Allercet M Syrup 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.