Answer
The selected formulation has only very low gluten levels and is regarded as gluten-free in its product information. It must not be used by someone with wheat allergy, which differs from coeliac disease.
Sources for this answer
- Strepsils Extra Triple Action Blackcurrant Lozenges — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.