Answer
Seek assessment if it persists or returns, or occurs with fever, rash or persistent headache. Get urgent help for breathing difficulty, chest pain, coughing up blood or feeling very unwell.
Sources for this answer
- Lemsip Cough for Mucus Cough & Catarrh 100mg/2.5mg/5ml Oral Solution — 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.