What it is used for
- Thinning thick phlegm in short- and long-term chest conditions
- Making it easier to cough up phlegm
How it is used
- Taken by mouth as tablets, syrup, drops or extended-release capsules
- Swallow extended-release capsules whole; do not open or crush
- Your doctor or pharmacist sets the dose
Before and while using it
- If symptoms continue or you develop a fever, see a doctor
- Stop it and seek help if a severe skin rash appears
- Tell your doctor if you are pregnant or breastfeeding
- Tell your doctor about other medicines you take
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: National drug formulary 2026, page 98
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.