Tell Your Dentist About a Possible Chlorhexidine Allergy
Breath & MouthArticleBefore a planned dental treatment, describe any previous reaction and ask the team to check products.
Current symptoms come first
Call 999 in the UK or your local emergency number for sudden mouth, tongue or throat swelling, trouble breathing or swallowing, or collapse. These can signal a serious allergic reaction. Do not drive yourself.1
Mention the previous reaction before treatment
MHRA says products or devices containing chlorhexidine should not be given to anyone with a possible history of an allergic reaction to chlorhexidine. This antibacterial ingredient occurs in products including over-the-counter mouthwashes.2
Try: “I previously reacted after using this product. Could it have contained chlorhexidine? Please record that history and check the products planned for my dental treatment.”2
Bring the product name or packaging and describe what happened. Let the team assess the history rather than deciding yourself whether it was an allergy. Ask them to explain the plan before treatment begins.2
This article is for general educational purposes only and is not medical advice. It isn't a substitute for diagnosis or treatment from a qualified healthcare professional who knows your health history. Please don't ignore professional advice or delay getting care because of something you read here. If you think you may be having a medical emergency, call 911 or your local emergency number right away. Girl Playbook does not endorse any specific product, test, or provider.
Girl Playbook sells this book. It provides education and worksheets, not individualized medical care.
Sources
The research behind this article, in the order it’s cited. How we source our articles.
- NHS, 2024Side effects of chlorhexidine (opens in a new tab)↩
- Medicines and Healthcare products Regulatory Agency, 2012Chlorhexidine: reminder of potential for hypersensitivity (opens in a new tab)abc
Spotted something out of date? Tell us and we’ll check it.
