Local anaesthetic

Benzocaine (بنزوكايين)

Benzocaine is a local anaesthetic that numbs the area it is applied to for a short time, easing pain in the throat, mouth and skin. It does not treat the cause of the pain.

What it is used for

  • Relieving sore throat pain (lozenges and spray)
  • Relieving pain from mouth ulcers and minor gum soreness
  • Relieving minor skin pain such as sunburn, minor burns and insect bites
  • With other ingredients in ear drops to ease ear pain, on a doctor's advice

How it is used

  • Lozenges are left to dissolve slowly in the mouth, not chewed or swallowed whole; do not eat or drink until the numbness wears off
  • The mouth and throat spray or the gel is applied to the sore area as the leaflet directs
  • The skin spray is used on the affected skin, not on open wounds or large areas
  • Ear drops are warmed in the hand and put into the ear with the head tilted, only after a doctor has checked the eardrum is intact
  • It is for short-term use only; follow the leaflet and ask your pharmacist

Possible side effects

  • Numbness or mild stinging where it is applied
  • Allergic reactions such as rash, itching or swelling
  • Rarely, a serious condition that lowers oxygen in the blood (methaemoglobinaemia): pale, grey or blue skin, lips or nails, breathlessness, headache and a fast heartbeat

Who should not use it

  • Do not use it if you are allergic to benzocaine, similar local anaesthetics such as procaine, or any ingredient in the product
  • Do not use it in babies and young children, or for teething pain
  • Do not use ear drops if the eardrum is perforated or there is discharge from the ear

Before and while using it

  • Get medical help straight away if the skin, lips or nails turn pale, grey or blue
  • While the mouth and throat are numb, take care with hot food and drinks and avoid biting your tongue or choking
  • See a doctor if a sore throat is severe, lasts more than a few days, or comes with a high temperature, rash or difficulty swallowing
  • Do not use it on large areas, broken skin or for long periods
  • People with G6PD deficiency (favism) or a past history of methaemoglobinaemia are at higher risk; ask a doctor first

Medicine interactions

  • Do not use other numbing products at the same time unless your doctor or pharmacist advises it
  • Tell your pharmacist if you take medicines that can raise the risk of methaemoglobinaemia, such as dapsone and nitrates

Pregnancy and breastfeeding

  • Short-term local use is usually considered acceptable in pregnancy and breastfeeding; ask your doctor or pharmacist first

How to store it

  • Store at room temperature away from heat and moisture, out of the sight and reach of children.

Get medical help straight away if

  • Your face, lips or tongue swell, or you find it hard to breathe.
  • You get a severe rash, blistering or peeling skin.
  • A side effect worries you or doesn’t go away: contact your doctor or pharmacist.

Questions about this medicine?

Talk to a doctor by video, or send your question by text.

Source: Standard international medicine references

This guide is general information and doesn’t replace advice from your doctor or pharmacist. Don’t start, stop or change a medicine without asking them, and always read the leaflet in the pack.