Medicines & Supplements A to Z > Bonjela


Last updated on 02/07/2021.

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

GENERIC NAME: Cetalkonium chloride + choline salicylate


DRUG CLASS: Analgesics

SUB CLASS: Nonsteroidal Anti-inflammatory Drugs

USED FOR: Oral ulceration, denture sore

– 15 g (gel)

What is Bonjela?

Bonjela is a brand of product used for the relief of pain associated with mouth ulcers, cold sores and denture sores. Bonjela has minor antiseptic effects which can help minor mouth ulcer infections and healing of sore spots due to dentures and orthodontic devices.

How to use it?

Bonjela is available as an oral gel. Use a clean finger or cotton swab to massage approximately 1 cm (or half an inch) of Bonjela gel onto the sore area, not more than once every 3 hours.

For denture irritation, apply and leave at least 30 minutes before reinsertion of the dentures. Do not apply directly to the dentures.

Bonjela should not be given to children below 16 years old unless medically advised to.

What are the side effects of Bonjela?

Bonjela is generally safe to use. However, it may trigger allergic reactions such as asthma attacks in susceptible people. Report to your doctor if you experience difficulty breathing after using Bonjela.

Who should not take Bonjela?

– People allergic to any component of the formulation.
– Anyone who has an allergy to NSAIDs or salicylates.
– Children and adolescents under the age of 16.
– Anyone who has an active ulcer disease.

Pharmacist Tips:

Common dosing schedule:
Apply to the mouth sore area once every 3 hours.
For denture irritation, apply and leave at least 30 minutes before reinsertion of the dentures.

Some common medications Bonjela may interact with:

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

Where to buy Bonjela in Hong Kong?

In Hong Kong, Bonjela 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 Bonjela 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.