Do I need a prescription to buy Asmin 4mg Tablet?

No. Asmin 4mg Tablet is a non-prescription product and can be ordered without a prescription. It is still dispensed by a registered pharmacist on DoctorOnCall.

What does Asmin 4mg Tablet contain?

Asmin 4mg Tablet is a tablet containing Montelukast Sodium equivalent to Montelukast 4mg. The full ingredient list is shown in the Composition or Ingredients section on this page and on the product packaging.

What pack sizes does Asmin 4mg Tablet come in?

It is supplied in a pack size of 10s. Choose the pack size you need from the options shown on this page before adding the item to your cart.

Why is there no information here about what Asmin 4mg Tablet is for?

This page is limited to product, safety and handling information in line with Malaysian rules on medicine information. If you want advice on whether this product suits you, book an online consultation with a doctor or pharmacist on DoctorOnCall.

How should I use Asmin 4mg Tablet?

Use it exactly as stated on the pack label, without changing the amount or how often you use it. If anything on the label is unclear, check with a pharmacist before the first use, and read the Directions for Use section on this page.

Can I speak to a doctor or pharmacist about Asmin 4mg Tablet before I buy it?

Yes. DoctorOnCall offers online consultations with licensed doctors and registered pharmacists, so you can ask about this product, your existing medicines, or anything on the label before you place an order.

What should I do if I notice side effects after using Asmin 4mg Tablet?

Stop using the product and speak to a doctor or pharmacist about any reaction that concerns you. Seek medical care immediately for signs of a severe reaction such as difficulty breathing, swelling of the face, lips or throat, or a widespread rash. Reported reactions are listed in the Side Effects section on this page.

How long will delivery take?

Within Malaysia, standard delivery takes 3 to 5 working days. Same-day delivery is available in the Klang Valley for orders placed before 12pm; orders placed after 12pm arrive by the end of the next day. Orders to Singapore are sent as international deliveries and take 5 to 9 working days. A lump-sum shipping and handling fee applies to every overseas delivery and is shown at checkout.

What payment methods can I use?

Customers in Malaysia can pay by FPX online banking, credit or debit card (Visa and Mastercard), and supported e-wallets including Touch ‘n Go eWallet, GrabPay and ShopeePay. FPX and local e-wallets are tied to Malaysian bank and wallet accounts, so if your delivery address is in Singapore, use the payment options displayed at checkout for that address rather than assuming the same list applies.

Can Asmin 4mg Tablet be delivered to Singapore?

Yes. DoctorOnCall ships to Singapore as an international order dispatched from Malaysia, arriving in 5 to 9 working days with a lump-sum shipping and handling fee. Singapore’s Health Sciences Authority (HSA) allows personal imports of up to three months’ supply of a medicine for your own use or an immediate family member’s, as long as it contains no controlled drugs, psychotropic substances or prohibited items. Keep the product in its original labelled packaging and keep a copy of your prescription or doctor’s letter with it. Quantities above three months’ supply, and medicines containing controlled substances, require prior HSA approval.

Is Asmin 4mg Tablet registered with the authorities?

Products listed on DoctorOnCall are registered with Malaysia’s Ministry of Health for supply in Malaysia, and each pack carries its MAL registration number. An order delivered to Singapore arrives as a personal import of a Malaysia-registered product; HSA product registration is not required for personal-use quantities, but it is also not the same as a product registered for sale in Singapore. If you need a locally registered Singapore product, buy it from a pharmacy in Singapore.

Who do I contact if there is a problem with my order?

DoctorOnCall’s customer care team handles order, delivery and product queries through the contact channels on the site, including WhatsApp and the online help centre. For deliveries to Singapore, allow more time before chasing an order than you would for a local Malaysian delivery, as the parcel passes through customs clearance and tracking updates can appear later in the journey.

Asmin 4mg Tablet | salbutamol | asthma airway relief tablet | DoctorOnCall Malaysia

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Reviewed byDr. Mohd Izzat Amir Bin AwangDoctor of Medicine (MD), University of Mansoura - Manchester

Written byDr. Adeline Carol PetersBachelor of Medicine and Bachelor of Surgery (MBBS) — Manipal Academy of Higher Education (MAHE)

Last updated: October 23, 2026

Overview

Asmin 4mg Tablet is a tablet with Montelukast Sodium equivalent to Montelukast 4mg declared as its active content. It is supplied in a pack size of 10s.

This is a non-prescription product and can be purchased without a prescription. Only product, safety and handling details are published on this page.

An online consultation with a DoctorOnCall doctor or pharmacist is available for this product, and a registered pharmacist reviews each order before dispatch to Malaysia or Singapore. Follow the directions on the label and on the leaflet inside the pack.

Directions for Use

Asmin 4mg Tablet is usually given once daily in the evening, as prescribed by the child’s doctor, and depending on its exact formulation may be chewable, dispersible, or intended to be given with food or liquid; follow the pharmacist’s specific instructions for administering it to a young child. It should be given consistently every day, even when the child appears well, unless the doctor advises otherwise.

Dosage

The 4mg strength is intended for young children within the age range specified by the prescribing doctor, generally around 2 to 5 years, and the exact dose and duration should follow the doctor’s instructions precisely. This medicine does not relieve a sudden asthma attack, so a reliever inhaler should still be available as directed by the child’s doctor.

Shelf Life

Asmin 4mg Tablet should be used within the shelf life printed on the packaging when stored correctly. Do not use the tablets after the expiry date shown on the box, and any unused or expired medicine should be disposed of safely.

Storage Instructions

Store Asmin 4mg Tablet at room temperature, away from direct light, heat, and moisture, in its original packaging until it is time for the next dose. Keep the medicine well out of the reach of children, as young-child formulations can sometimes be mistaken for sweets.

Side Effects

Shakiness or tremors
Headache
Increased heart rate
Nervousness or restlessness
Muscle cramps
Dry mouth or throat irritation

Contraindications

Known hypersensitivity to montelukast or any ingredient in the tablet
Not intended for relief of acute asthma attacks or status asthmaticus
Use with caution in children with a history of mental health or behavioural changes, and report any new mood or behaviour symptoms to the doctor
Should not replace other prescribed asthma medicines without the doctor’s specific instruction
Use only under medical guidance if the child has liver impairment

Drug / Food Interactions

May interact with certain enzyme-inducing medicines such as phenobarbital or rifampicin, which can reduce montelukast’s effect
Inform the doctor of all other medicines, including other asthma or allergy treatments, the child is taking
No significant food restrictions are required, and it can be taken with or without meals as directed
Do not combine with other leukotriene modifiers unless specifically directed by the doctor

Quick Tips

Give the dose at the same time each evening to build a consistent routine
Continue giving this medicine daily even when the child has no symptoms, unless the doctor says to stop
Always keep a reliever inhaler available as prescribed, since this medicine does not treat sudden attacks
Watch for and report any unusual mood, behaviour, or sleep changes to the doctor
Keep all scheduled follow-up appointments to monitor the child’s asthma control
Store safely away from young children to avoid accidental ingestion

Ingredients / Active Ingredients

Salbutamol

Montelukast Sodium equivalent to Montelukast 4mg
Mannitol
Microcrystalline Cellulose
Magnesium Stearate

Safety Advice

Pregnancy

Safe If Prescribed

This medicine should only be used during pregnancy if prescribed by a doctor after careful evaluation.

Breastfeeding

Generally Safe

This medicine is generally safe during breastfeeding with minimal risk to the infant.

Kidney

Generally Safe

Generally safe, but caution may be required in some patients.

Liver

Generally Safe

Generally safe, but caution may be required in some patients.

Alcohol

Use With Care

Caution is advised when consuming alcohol with this medicine.

Driving

Use With Care

Use caution while driving until you know how this medicine affects you.

Relevant Information

Asmin 4mg Tablet is generally used as a long-term preventive treatment for young children and works best when given regularly as part of an overall asthma or allergy management plan agreed with the child’s doctor. Parents and caregivers should keep track of symptom frequency and any side effects, particularly changes in mood, sleep, or behaviour, and discuss these at follow-up visits so that treatment can be adjusted if needed.