Answer
Discuss this with the prescriber. Product information says risk cannot be excluded, although UK specialist guidance considers dexamethasone used in the ear compatible with breastfeeding in full-term, healthy infants.
Sources for this answer
- Otomize Ear Spray/ Dexamethasone/ Neomycin sulfate/ Acetic acid 0.1%w/w / 0.5%w/w / 2%w/w Ear Spray — Current selected SmPCemc · Summary of Product Characteristics
- NHS Specialist Pharmacy Service