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Educational Medication GuidePrescriptionClass: Leukotriene Receptor Antagonists

Montelukast

Generic Name: Montelukast Sodium

Common Brand Names: Singulair
Dosage Form:Tablet, Chewable Tablet, Granules
Route:Oral
Pregnancy Category:B
Last Reviewed:9/21/2026

Uses & Medical Indications

Prophylaxis and chronic treatment of asthma, allergic rhinitis

Medical Conditions Treated:

Asthma, Exercise-induced bronchoconstriction, Allergic Rhinitis

Work Mechanism & Pharmacology

How It Works

Patient Overview of Work Mechanism

Montelukast works at the cellular level to correct underlying biochemical imbalances, reduce clinical symptoms, and support overall health.

Clinical Mechanism of Action (MoA)

Montelukast exerts targeted therapeutic activity by interacting with specific cellular receptors, enzymatic pathways, or biological signaling cascades to relieve symptoms and restore physiological balance.

Primary TargetMontelukast
Therapeutic FamilyAntiasthmatic, Antiallergic
Administration RouteOral

Dosage & Administration Guidelines

Adult Dosage

10 mg once daily in the evening

Pediatric Dosage

4 mg (2-5 yrs) or 5 mg (6-14 yrs) once daily

Elderly / Geriatric Considerations

Same as adult

Maximum Dose Limit

10 mg/day

Renal Impairment:

No adjustment necessary

Hepatic Impairment:

No adjustment for mild-moderate; unstudied in severe

Side Effects & Safety Warnings

Common Side Effects

Headache, abdominal pain, cough, flu-like symptoms

Serious Adverse Reactions

Neuropsychiatric events, Churg-Strauss syndrome

Contraindications:

Hypersensitivity to montelukast

Important Warnings & Precautions:

Boxed warning for serious neuropsychiatric events

Interactions (Drugs, Food & Alcohol)

Drug-Drug Interactions:

Phenobarbital, rifampin may decrease levels

Food & Dietary Interactions:

Take granules directly or mixed with specific soft foods

Alcohol Interaction Warning:

No significant interaction

Pregnancy & Breastfeeding Safety

Pregnancy Safety

Considered generally safe during pregnancy if needed

Breastfeeding / Lactation

Excreted in human milk; use with caution

Patient Counseling & Practical Advice

How to Take:

Not for acute asthma attacks. Report mood/behavior changes.

What to Do if You Miss a Dose:

Skip the missed dose and resume usual schedule.

Recommended Monitoring & Lab Tests:

Behavioral/mood changes, asthma control

Emergency Medical Warning

When to Seek Urgent Medical Attention

Seek immediate emergency medical care (call emergency services or proceed to the nearest emergency department) if you experience signs of a life-threatening allergic reaction (anaphylaxis: facial, lip, tongue, or throat swelling causing airway obstruction), severe cutaneous blistering with skin peeling, sudden intense chest pain, or symptoms of overdose.

Emergency Safety Protocol: If an intentional or accidental overdose is suspected, contact your regional Poison Control Center or emergency services immediately. Do not induce vomiting unless strictly advised by emergency healthcare personnel.
Educational Sources & References

Content for Montelukast was synthesized from standardized public health monographs, official pharmacopoeias, and health authorities:

  • Central Drugs Standard Control Organization (CDSCO) — National List of Essential Medicines
  • World Health Organization (WHO) — Model List of Essential Medicines
  • Indian Pharmacopoeia Commission (IPC) — Indian Pharmacopoeia Drug Monographs
  • National Health Service (NHS) — Medicines A to Z Clinical Guidelines
Published by: Medi Info Hub TeamLast Updated: 10/19/2026

The information provided on this website is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.