Answer
Seek advice if it worsens or persists, or if breathlessness, fever or pus-like phlegm develops. Obtain urgent assessment for difficulty breathing, chest pain or coughing up blood.
Sources for this answer
- Benylin Herbal Chesty Coughs Sugar Free Syrup — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.