benzocaine at a glance
Medicine class
Ester-type local anaesthetic
Usual role
Temporary local relief of specified mouth or tooth pain
Who can use selected products
Adults and young people aged 12 years and over
Important practical point
Avoid hot drinks while the treated area is numb
What is benzocaine used for?
Selected products are licensed for temporary local pain relief.
Orajel Mouth Gel: pain and tenderness associated with mouth ulcers or wearing dentures.
Orajel Extra Strength: toothache associated with an open carious lesion and direct exposure of vital dental pulp.
How does benzocaine work?
Benzocaine temporarily blocks sensory nerve impulses near the application site. This reversibly numbs the area but does not treat decay, infection or the underlying cause of pain.
How to take benzocaine
Use only the product intended for the specific problem and follow its pack leaflet.
For mouth-ulcer or denture pain, clean and dry the affected area and apply a thin layer inside the mouth.
For the selected toothache gel, use a clean finger or swab to place the gel into the tooth cavity.
Avoid hot liquids because numbness may make burns harder to notice.
Persistent toothache needs dental assessment; benzocaine provides temporary relief only.
benzocaine side effects
Common or expected effects
- Local burning, stinging, itching, redness, rash or swelling have been reported; their frequency is not stated.
- Contact dermatitis can occur, including reactions associated with sorbic acid or propylene glycol in relevant formulations.
Get urgent medical advice
- Methaemoglobinaemia: blue or grey lips, skin or mouth lining, unusual breathing or breathlessness.
- Severe hypersensitivity: rapidly developing mouth, tongue or throat swelling, difficulty swallowing, wheeze or breathing difficulty.
benzocaine in pregnancy
Evidence about benzocaine safety during human pregnancy is inadequate, although long-standing use has not revealed apparent harm in the selected product information. Consult a pharmacist, midwife or prescriber before use.
benzocaine while breastfeeding
No clinical breastfeeding data are available for the selected products. Consult a pharmacist or prescriber before use, particularly if repeated treatment is being considered or the infant is premature or unwell.
benzocaine interactions
The selected product information identifies one clinically relevant medicine-class interaction.
Sulphonamide antibacterials
Benzocaine can inhibit their antibacterial action, so concurrent use should be avoided.
Common questions about benzocaine
Answers are fully visible for fast scanning and source review.
Can benzocaine cure toothache?
No. It temporarily numbs pain but does not treat decay, exposed pulp or infection. Persistent toothache needs dental assessment.
Can benzocaine heal a mouth ulcer?
It can temporarily reduce ulcer pain but does not directly heal the ulcer. An ulcer lasting longer than three weeks should be assessed by a GP or dentist.
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.