Answer
No. Siponimod should not be used during breastfeeding because exposure through milk and serious effects on the infant cannot be excluded.
Sources for this answer
- Mayzent 0.25 mg, 1 mg & 2 mg film-coated 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.