Answer
A previous penicillin reaction does not automatically determine this. Cross-allergy can occur, so its nature and severity must be assessed before use.
Sources for this answer
- Cefalexin 250mg Capsules — 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.