Prescription requiredAntiallergic (Anti-asthmatic adjunct)

Allerter M Kid Syp — Side Effects & Warnings

Known side effects of Allerter M Kid Syp include Drowsiness, fatigue, headache, dry mouth, abdominal pain, nausea, diarrhea, dizziness. Not everyone experiences these side effects.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated August 2026

Common Side Effects

Drowsiness
fatigue
headache
dry mouth
abdominal pain
nausea
diarrhea
dizziness

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Use only on doctor’s advice in children. May cause sleepiness—avoid activities requiring alertness. Montelukast has been associated with mood/behavior changes (irritability, nightmares, anxiety, depression); stop and seek medical advice if these occur. Not for acute asthma attack relief. Use caution in liver disease and in children with a history of seizures. If symptoms persist or worsen, consult a doctor.

Drug Interactions

Allerter M Kid Syp may interact with the following:

Alcohol or other CNS depressants (increased drowsiness)
sedating antihistamines
phenobarbital/phenytoin/rifampicin (may reduce montelukast levels)
theophylline (monitor)
strong CYP enzyme inducers

Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.

Pregnancy Safety

Consult doctor

Alcohol Interaction

Use with caution

Habit Forming

Storage

Store below 25°C in a cool, dry place. Protect from light. Keep bottle tightly closed. Do not freeze. Keep out of reach of children.

Allerter M Kid Syp — Safety Summary

Composition: Montelukast 4 mg + Levocetirizine 2.5 mg per 5 ml (typical pediatric combo)
Prescription: Required (Rx)
Pregnancy: Consult doctor
Alcohol: Use with caution
Habit forming: No

Allerter M Kid Syp — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

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Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.