Medicines & Supplements A to Z > Loperamide


Last updated on July 3, 2019.

Overview   |   Dosage   |   Side Effects   |   Where To Buy  

GENERIC NAME: Loperamide



What is Loperamide for?

Loperamide (Imodium) is an opioid that can slow down and reduce the number of bowel movements. It can therefore be used as an anti-diarrheal agent to treat both acute and chronic diarrhoea.

How to use it?

Loperamide (Imodium) can be taken by mouth as tablets or capsules. The dosages for different uses and age groups are listed below: 

For acute diarrhoea 

Adult / Child 12-17 years

Start with 4 mg after each loose stool, then 2 mg for up to 5 days. The usual daily dose is 6-8 mg while the maximum daily dose is 16 mg. 

Child 4-7 years 

1 mg 3-4 times daily for up to 3 days. 

Child 8-11 years 

2 mg 4 times daily for up to 5 days. 

For chronic diarrhoea 


Start with 4-8 mg daily in divided doses. The dose may be adjusted according to your response. The maintenance dose is up to 16 mg daily in 2 divided doses. 

What are the side effects of Loperamide?

Common side effects of Loperamide (Imodium) include gastrointestinal disorders, headache, and nausea.

Where to buy Loperamide in Hong Kong?

In Hong Kong, Loperamide 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

For detailed information about the use of Loperamide 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.