Benzocaine (topical): uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Benzocaine is a topical numbing agent for mouth ulcers and teething pain. It belongs to the Local anaesthetic group. These numb a part of the body for procedures or to relieve local pain.

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Drug type — dosing is set by your doctor

Measure	Range
Drug class	Local anaesthetic
Type	Prescription
Dose	Individual — ask your doctor or pharmacist

What it is used for

Mouth ulcers and minor mouth pain
Sore throat lozenges and sprays
Minor skin pain, itching or insect bites

Common brand names

India: Mucopain, Dentogel
Worldwide: Orajel, Anbesol

Common side effects

Brief stinging or burning
Numbness of the area
Skin or mouth irritation

Before taking it — precautions

Not for teething babies or children under two
Do not use more than directed or over large areas
Avoid if allergic to local anaesthetics

When to see a doctor urgently

Bluish-grey lips, skin or nails with breathlessness or headache (methaemoglobinaemia) (urgent)
Swelling of the face or throat (urgent)
Mouth ulcer not healing after a few weeks

Not a prescription — no dose shown. The right dose of benzocaine depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.

Frequently asked questions

Can I use benzocaine gel for my baby's teething?

No. Benzocaine can cause a rare but dangerous blood problem in young children. Use a cool teething ring instead and ask your doctor.

Why are my lips bluish after using it?

This may be methaemoglobinaemia, where blood carries less oxygen. Seek urgent medical help.

How long does it numb for?

Usually a short time; it relieves pain but does not heal the ulcer.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.