Singulair
Singulair is a medicine that helps prevent and control asthma symptoms by blocking substances that narrow the airways.
Form
rakeet
Strength
4 mg
Active Ingredient
Montelukast sodium
Manufacturer
N.V. Organon
How to Use
Dosage
One sachet (4 mg granules) once daily in the evening.
Method
Give orally either directly into the mouth or mixed with a spoonful of cold or room-temperature soft food (e.g., applesauce, ice cream). Ensure the child eats the entire mixture within 15 minutes. Do not dissolve in liquids, but the child can drink after swallowing.
Important
Do not exceed one sachet (4 mg) per day. Do not give a double dose to make up for a forgotten dose.
Possible Side Effects
COMMON
- •Upper respiratory tract infection
- •Diarrhea
- •Hyperactivity
- •Asthma symptoms
- •Flaky and itchy skin
- •Rash
- •Abdominal pain
- •Headache
- •Thirst
- •Nausea
- •Vomiting
- •Fever
- •Increased liver enzymes
RARE
- •Allergic reactions (e.g., swelling of face, lips, tongue, and/or throat, which may cause difficulty breathing or swallowing)
- •Behavioral and mood changes (e.g., anxiety, aggressive behavior, hostility, depression, abnormal dreams including nightmares, insomnia, sleepwalking, irritability, restlessness, attention disturbance, memory impairment, tics, obsessive-compulsive symptoms, stuttering, hallucinations, disorientation, suicidal thoughts and behavior)
- •Seizures
- •Increased bleeding tendency
- •Tremor
- •Palpitations
- •Dizziness
- •Drowsiness
- •Tingling or numbness
- •Nosebleed
- •Dry mouth
- •Indigestion
- •Bruising
- •Itching
- •Hives
- •Joint or muscle pain, muscle cramps
- •Bedwetting in children
- •Weakness/fatigue, general feeling of being unwell, swelling
- •Churg-Strauss syndrome (a combination of symptoms like flu-like illness, tingling/numbness in arms/legs, worsening lung symptoms, and/or rash)
- •Low platelet count
- •Swelling (inflammation) in the lungs
- •Severe skin reactions (e.g., erythema multiforme)
- •Liver inflammation (hepatitis)
- •Painful red lumps under the skin, most often on the shins (erythema nodosum)
Important Warnings
- If your child's asthma worsens or breathing becomes difficult, contact a doctor immediately.
- Singulair is not for sudden asthma attacks. Always carry your child's quick-relief inhaler.
- Do not stop giving other prescribed asthma medications to your child, as Singulair is not a replacement.
- Contact your doctor if your child develops flu-like symptoms, tingling or numbness in arms/legs, worsening lung symptoms, or rash.
- Do not give aspirin or other NSAIDs if they worsen your child's asthma.
Show 1 more warnings
- Mental changes like mood or behavior changes, depression, or suicidal thoughts have been reported; contact a doctor if these occur.
Use in Elderly Patients
Category A
Suitable for older adults. Consider possibility of adverse neuropsychiatric effects. Avoid grapefruit. (updated 17.2.2025)