Answer
Seek assessment if it persists, rapidly worsens or occurs with breathing difficulty, chest pain, coughing up blood, marked illness or unexplained weight loss.
Sources for this answer
- Covonia Original Bronchial Balsam 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.