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Mouthwash

Fluoride rinses, everyday mouthwashes and short-term medicated rinses – and how to use them without undoing your brushing.

What you need to know

The NHS says a fluoride mouthwash can help prevent tooth decay, but you shouldn't use it straight after brushing because it washes away the concentrated fluoride from your toothpaste. Use it at another time, such as after lunch, and don't eat or drink for 30 minutes afterwards.

Chlorhexidine mouthwashes, such as Corsodyl's 0.2% products, are medicines for short-term use – usually up to 4 weeks, according to the NHS – and can temporarily stain teeth.

What to look for

  1. Choose a fluoride mouthwash if your goal is decay prevention.
  2. Use mouthwash at a different time from brushing.
  3. Treat chlorhexidine rinses as short-term medicines and read the leaflet.
  4. Check age limits on the label – some are not suitable for young children.
  5. Mouthwash does not replace brushing or cleaning between teeth; see a dentist about persistent bad breath or bleeding gums.

Products to consider

Listed alphabetically, not ranked. Features are from the manufacturers’ UK websites. Some links may be affiliate links.

Sources we used

Checked September 2026. Guidance changes, so always follow the advice of your own dental team. About our sources.