Montelukast

Montelukast blocks leukotrienes, which are chemicals the body releases when you breathe in an allergen, causing swelling in your lungs.

Dosage by Body Weight

Dosed by age/weight. Granules can be mixed with soft foods (applesauce, rice) but not dissolved in liquid.

Weight-based dosage tracking table for Montelukast, including body weight, dose, frequency, and tracking notes.
Body Weight	Dose	Frequency	Tracking Notes
Under 15 kg (Age 6m-5y)	4 mg	Once daily (evening)	Use granules for very young children; chewable tablets for ages 2+.
Over 15 kg (Age 6-14y)	5 mg	Once daily (evening)	Chewable tablet formulation.

Chewable TabletGranulesTablet

Leukotriene receptor antagonist used for the long-term treatment of asthma and relief of seasonal allergies.

Montelukast is listed as a generic drug name. Common branded medicines that may contain the same active ingredient include:

Yes. This medicine should be supplied or used only according to applicable prescription and regulatory requirements.

CAUTION

Alcohol has no major direct interaction with montelukast, but avoid alcohol if it worsens sleep, mood, or asthma control.

SAFE IF PRESCRIBED

Montelukast may be continued during pregnancy when prescribed for asthma or allergies. Do not stop asthma control medicine without medical advice.

SAFE IF PRESCRIBED

Montelukast passes into breast milk in low amounts and is generally considered acceptable when prescribed. Consult your healthcare provider.

SAFE

Montelukast usually does not impair driving, but sleepiness, dizziness, or mood changes can occur. Avoid driving if affected.

CAUTION

Montelukast is processed by the liver. People with liver disease should use it with medical advice and report unusual symptoms.

SAFE IF PRESCRIBED

Montelukast generally does not require kidney dose adjustment, but use under medical guidance for chronic conditions.