Answer
Seek medical or pharmacist advice first for asthma, COPD, a smoking-related or persistent cough, or excessive mucus. These symptoms may need assessment.
Sources for this answer
- Benylin Mucus Cough Night — 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.