Answer
No. Cefalexin is a cephalosporin antibiotic, although cephalosporins and penicillins both belong to the beta-lactam family.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Cefalexin Tablets 500mg — 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.