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Jefferson T
Daily preventer tablets to treat mild asthma and allergy relief.
Used for
A preventer for mild asthma and allergy relief, works by reducing airway inflammation.
How to use it*
Take 1 tablet once daily, preferably in the evening.
How long to work
Takes 1–2 weeks for full benefits.
Common side effects*
Headache, stomach pain, diarrhea, and cough.
Who should not take it*
Avoid when pregnant/breastfeeding, or if you have a history of mood disorders.
Interactions*
May interact with other medications for seizures or aspirin.
Generic/branded.
Generic: Montelukast
Brand: Singulair
* Always consult the patient leaflet for comprehensive information.
Montelukast is a leukotriene receptor antagonist used to manage asthma symptoms. It is also prescribed for hay fever relief.
Leukotrine receptors are found in our airways and play a key role in asthma. Leukotrienes are inflammatory molecules that bind to these receptors to cause airway swelling, tightening of the muscles in the airways, and increased mucus production.
Montelukast works by blocking leukotrienes, reducing inflammation, and helping to manage asthma symptoms.
Yes, Singulair and Montelukast are the same medication. Singulair is the brand name, while Montelukast is the generic name.
Montelukast is suitable for patients who need long-term control of asthma symptoms.
You should not take Montelukast if you are allergic to the active ingredient, or to any of the other ingredients in this medicine.
Speak to your doctor before taking this medicine if you:
To take Montelukast correctly, follow the steps below:
If you experience any of these symptoms, seek immediate medical advice:
Yes, you can buy Montelukast 10mg tablets online at SpeedyHealth after completing our free online consultation.
Montelukast is a prescription-only medication. This means that you will need to complete an online consulation so that our doctors can make sure it is safe and suitable for you to take.
Medically reviewed by Dr. Adrian Rawlinson
Written by our editorial team | Last reviewed January 02, 2026
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