This NHS content is written for people in England. Medicine names, availability, prescribing and services may differ in other countries.
Who can use chlorhexidine
Most adults and children can use chlorhexidine skin treatments.
Chlorhexidine throat spray, lozenges and dental treatments (such as mouthwash and dental gel) can be used by adults and children aged 12 years or over.
Who may not be able to use chlorhexidine
Chlorhexidine is not suitable for some people. To make sure it's safe for you, tell a pharmacist or doctor if you:
- have ever had an allergic reaction to chlorhexidine or any other medicine
- have difficulty swallowing
- need to avoid alcohol
Some chlorhexidine sprays and mouthwashes may contain very small amounts of alcohol. Ask a pharmacist, doctor or dentist about medicines without alcohol.
If you have a sore throat, do not use chlorhexidine and speak to your doctor if:
- your sore throat is severe
- your sore throat has lasted for more than 2 days
- you have problems swallowing
- you have a high temperature
- you have a headache
- you're feeling or being sick (nausea or vomiting)
View the original NHS website page ↗. Refreshed 19 August 2026.
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