I have followed two mothers with multiple sclerosis who breastfed their
babies well over 6 months.  One obviously deteriorated during this time,
the other had the longest period of time she had ever had without any
deterioration, while she was breastfeeding, and had a relapse soon after
weaning.

The physician who wants the mother to wean so that new medication can be
used is probably wrong about the mother not being able to breastfeed
with the medication.  Which medication is it?

Jack Newman, MD, FRCPC