Medicines & Supplements A to Z > Silymarin


Last updated on 02/08/2021.

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





DRUG CLASS: Supplements

SUB CLASS: Herbal medicines

USED FOR: Nutritional supplementations

AVAILABLE DOSAGE FORMS: 70 mg, 140 mg (capsules)

What is Silymarin for?

Silymarin is an extract of milk thistle seeds. Silymarin has long been used in traditional medicine in many countries. It is claimed to have antifibrotic effects and protects the liver from fibrosis and other types of damage. However, the effects of Silymarin is not yet fully understood.

How to use it?

Silymarin is available in oral capsules which should be taken with food. For hepatic diseases, take 140 mg 2-3 times daily.

What are the side effects of Silymarin?

Common side effects of Silymarin include diarrhoea, flatulence, loss of appetite, nausea and stomach upset.

Who should not take Silymarin?

– People allergic to Silymarin or any component of the formulation
Pregnant or breastfeeding women

Pharmacist Tips:

– Consult your doctor or pharmacist before using Silymarin, especially if you have liver problems.

Common dosing schedule:
Take Silymarin 2-3 times daily.

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

Some common medications Silymarin may interact with:
Silymarin has no known interactions with common medications.

Where to buy Silymarin in Hong Kong?

In Hong Kong, Silymarin 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 Silymarin 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.