Medicines & Supplements A to Z > Thymol


Last updated on 12/07/2021.

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



BRAND NAME(S) IN HONG KONG: Xepa Thymol MouthWash, Glycerin thymol gargle 齒腔健

DRUG CLASS: Antiseptics

SUB CLASS: Antibacterial

USED FOR: Oral hygiene, gingivitis

– 120 ml, 240 ml (mouthwash)

What is Thymol for?

Thymol is found in the oils of the plant Thymus vulgaris, or common thyme. Thymol is used as an animal repellent, fungicides, virucides (a substance which kills viruses) in many disinfection products. Thymol also has non-pesticidal uses, including in perfumes, cosmetics, food flavourings and mouthwashes, in which it provides a distinctive, pleasant odour and antiseptic properties.

How to use it?

Thymol is available as an active ingredient in many medical and non-medical products. Please refer to the product description for specific directions of use.
For mouthwashes containing thymol, dilute 1 part with 3 parts warm water before use. Use the mouthwash as directed by your doctor or the product insert. Spit out the mouthwash after use and do not swallow. Avoid using the mouthwash right after brushing, since this may wash away the fluoride from your toothpaste.

What are the side effects of Thymol?

Thymol may cause gastric irritation or skin rash if swallowed.

Who should not take Thymol?

People allergic to Thymol or any component of the formulation

Pharmacist Tips:

Avoid using mouthwash right after brushing teeth, since this may wash away the fluoride from your toothpaste.

Common dosing schedule:
Use as directed by your doctor or dentist.

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

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

Where to buy Thymol in Hong Kong?

In Hong Kong, Thymol 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 Thymol 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.