Answer
It is not recommended because evidence is lacking. Insulin or metformin are generally preferred during breastfeeding.
Sources for this answer
- Pioglitazone 30 mg tablets — Current selected SmPCemc · Summary of Product Characteristics
- NHS Specialist Pharmacy ServiceNHS Specialist Pharmacy Service · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.