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Using drugs can seriously harm your teeth, gums and mouth.

Many of these problems can be improved if drug use is reduced or stopped.

If you are struggling to cut down or stop, speak to a doctor, dentist or healthcare professional. They can help you find support.


Can drugs affect my teeth and mouth?

Yes. Both illegal drugs and some misused substances can damage oral health.

These include:

  • Methamphetamine (meth, speed, ice, crystal meth).
  • Heroin.
  • Cocaine.
  • MDMA (ecstasy).
  • Cannabis.

How do drugs harm dental health?

Drugs can affect your mouth in several ways:

More sugar cravings

  • Some drugs make people crave sugary snacks and fizzy drinks.
  • Sugar feeds the bacteria that cause tooth decay.

Dry mouth

  • Drugs such as methamphetamine, heroin and some stimulants reduce saliva.
  • Saliva protects teeth by washing away food and neutralising acids.
  • A dry mouth increases the risk of tooth decay, gum disease and mouth infections.

Teeth grinding and jaw clenching

Drugs like ecstasy, methamphetamine and cocaine can cause jaw clenching and grinding. This can lead to:

  • Cracked or broken teeth.
  • Tooth wear.
  • Headaches.
  • Jaw pain.

Poor oral hygiene

When someone is under the influence, brushing and cleaning between teeth may be forgotten.

This allows plaque to build up, leading to:

  • Gum disease.
  • Tooth decay.
  • Tooth loss.

Getting help

If you are worried about drug use and your oral health:

  • Tell your dentist – they are there to help, not judge.
  • Speak to your doctor or a local support service.
  • Try to keep brushing your teeth for two minutes, last thing at night and one other time during the day with a fluoride toothpaste.
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