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Detailed medicine guidance

Who can and cannot use carmellose sodium eye drops

NHS medicines information on who can use carmellose sodium eye drops and who may not be able to use them.

About this information

This NHS content is written for people in England. Medicine names, availability, prescribing and services may differ in other countries.

Who can use carmellose sodium eye drops

Most adults and children can use carmellose sodium eye drops.

Who may not be able to use carmellose sodium eye drops

Carmellose sodium eye drops are not suitable for some people.

To make sure they're safe for you, tell your doctor, pharmacist or optometrist before using the eye drops if you:

  • have ever had an allergic reaction to carmellose sodium or any other medicine
  • wear contact lenses – you can still use carmellose sodium, but check the leaflet that comes with the eye drops to see if you need to remove your contact lenses first

Some brands of carmellose sodium eye drops contain preservatives to keep them clean (sterile) and safe to use for longer. These are safe for most people to use.

Eye drops without preservatives are recommended if you:

  • are sensitive or allergic to eye drops that contain a preservative
  • have a moderate to severe dry eye condition, where you use eye drops more than 4 times a day
  • use more than 1 type of eye drops or eye ointment
  • use soft or hybrid contact lenses

View the original NHS website page ↗. Refreshed 19 August 2026.

Licensed under the Open Government Licence v3.0 ↗. MyPHU is independent and is not endorsed by the NHS.

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