Levocet M Syrup: Uses, Composition, Side Effects & FAQs

Levocet M Syrup (Hetero Drugs) is a prescription syrup that combines levocetirizine 2.5 mg and montelukast 4 mg in every 5 ml. It is commonly prescribed for allergy symptoms, including in children.

Last reviewed: November 2026. General information only, not medical advice. Contents and strengths can differ by manufacturer and batch, so always check your pack and follow your doctor.

Quick Facts

Brand	Levocet M Syrup (Hetero Drugs Ltd)
Form	Syrup, 60 ml bottle
Per 5 ml	Levocetirizine 2.5 mg and montelukast 4 mg
Used for	Allergic rhinitis and allergic skin conditions
Prescription	Required. Not habit forming per the listing
Storage	Below 30 degrees Celsius

Levocet M Syrup Composition

Levocetirizine (2.5 mg per 5 ml): an antihistamine that blocks histamine.
Montelukast (4 mg per 5 ml): a leukotriene blocker that reduces swelling in the nose and airways.

What Is Levocet M Syrup Used For?

Allergic rhinitis: sneezing, runny and blocked nose
Allergic skin problems such as eczema, allergic dermatitis and insect bite reactions
Allergy-related wheezing or cough, as decided by the doctor

How It Works

Levocetirizine stops histamine from causing itching and sneezing, while montelukast reduces inflammation in the airways. Together they treat more than one part of an allergic response.

How to Take It

Give it exactly as prescribed, at the same time each day, with or without food. Shake well and use the measuring cup. If a child vomits within 30 minutes of a dose, the dose should be repeated as advised. Do not change the dose without medical advice, and do not stop suddenly if it is used for asthma control.

Possible Side Effects

Side effects are usually mild and temporary:

Upper respiratory tract infection symptoms
Nausea, vomiting or diarrhoea
Dizziness, sleepiness or headache
Dry mouth or rash
Sleep or mood changes such as nightmares or irritability

Seek urgent care for breathing difficulty, swelling of the face, a severe rash, or marked mood or behaviour changes.

Precautions and Who Should Be Careful

Use caution in kidney or liver disease. It is not recommended in severe kidney disease.
Montelukast has rarely been linked to mood and behaviour changes, so watch children closely.
It may cause drowsiness that affects concentration or sports.
Avoid other cold, cough or antihistamine medicines unless your doctor advises.
It is not for treating an asthma attack that has already started.

Key Points to Remember

Watch for mood, sleep or behaviour changes, especially in children.
It does not replace an inhaler during an asthma attack.
Give it at the same time every day.

When to Contact a Doctor

Any change in mood, behaviour or sleep, such as nightmares or aggression
Breathing trouble or wheezing that is not settling
Rash or swelling of the lips or face
Allergy symptoms that are not improving

Practical Tips

Keep dust, pets and pollen away from the child room where possible.
Wash bedding often in hot water.
Use a measuring cup, not a kitchen spoon.
Write down the time of each dose to avoid doubling up.

Questions to Ask Your Doctor or Pharmacist

What is triggering my child allergy?
How long should we continue the syrup?
What mood or behaviour changes should I watch for?
Does my child need an inhaler as well?

Frequently Asked Questions

Is Levocet M syrup safe for children?

It is commonly prescribed to children, but only at the dose set by the doctor. Watch for mood or sleep changes.

Can Levocet M be used for an asthma attack?

No. It does not treat an asthma attack in progress, so use the reliever your doctor prescribed.

Does Levocet M cause sleepiness?

It can cause drowsiness in some children and adults.

What if my child vomits after the dose?

The listing says to repeat the dose if the child vomits within 30 minutes, but check with your doctor.

Further reading: MedlinePlus (NIH): Levocetirizine | MedlinePlus (NIH): Montelukast

Sources

1mg: Levocet M Syrup