Answer
Seek urgent medical advice if diarrhoea is severe, persistent or contains blood or mucus, including after treatment. Do not use bowel-slowing medicines unless advised by a clinician.
Sources for this answer
- Benzylpenicillin benzathine 2.4 Million I.U. powder for suspension for injection — 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.