Answer
Yes. It can cause drowsiness, dizziness and impaired concentration. Do not drive, cycle or use machinery if affected.
Sources for this answer
- Benylin Chesty Coughs (Original) — 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.