Medicines & Supplements A to Z > Imodium


Last updated on 19/10/2021.

Overview   |   Dosage   |    Side Effects   |   Precautions  |   Tips  |   Where To Buy  

GENERIC NAME: Loperamide


DRUG CLASS: Gastrointestinal drugs

SUB CLASS: Antidiarrheal agents

USED FOR: Symptomatic relief of diarrhea, Traveller’s diarrhea

– 2mg (tablets)

What is Imodium for?

Imodium is a brand product that contains Loperamide, which is an opioid that can slow down bowel movements. It is used for the symptomatic relief of diarrhea, including Traveller’s diarrhea.

How to use it?

Imodium is available as tablets. The doses are different depending on different age groups.

For adult / children 12 years or above: start with 4mg after each loose stool, followed by 2 mg after each subsequent loose stool. The usual daily dose is 6-8mg and the maximum daily dose is 16mg.

9-11 years weighing >27-43 kg: start with 2 mg with first loose stool followed by 1 mg after each subsequent loose stool. Maximum daily dose is 6 mg/day.

6-8 years weighing 21-27kg: start with 2 mg with first loose stool followed by 1 mg after each subsequent loose stool. Maximum daily dose is 4 mg/day.

What are the side effects of Imodium?

Common side effects of Imodium include constipation and nausea.

Who should not take Imodium?

– People who are allergic to loperamide or any component of the formulation.
– Children under 2 years of age
– People with stomach discomfort but no diarrhea

Pharmacist Tips:

– Do not exceed the recommended dose as it can cause adverse effects.
– Speak to your doctor if your diarrhea lasts for more than 2 days.
– Be sure to stay hydrated when having diarrhea.
– Avoid raw food, spicy or oily food when taking Imodium for diarrhea.
– Avoid driving or operating machinery while taking this medication as tiredness, dizziness, or drowsiness may occur.

Common dosing schedule:
Imodium can be taken with or without food. You should take it with plenty of water.

This schedule is for reference only, adjustments may be made according to individual needs.

Some common medications Imodium may interact with:

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Imodium in Hong Kong?

In Hong Kong, Imodium is an over-the-counter medicine and can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at

Need more information?

For detailed information about the use of Imodium in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.