Answer
Mild diarrhoea is common, but severe, persistent or bloody diarrhoea requires prompt medical assessment because antibiotic-associated colitis is possible.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Erythrocin 500 Tablets — 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.