Answer
Mild diarrhoea is common. Severe, persistent, bloody or mucus-containing diarrhoea needs urgent assessment because antibiotic-associated colitis is possible.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Cefalexin 250mg Capsules — 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.