If this stuff is given by injection, maybe it is not absorbed orally, in
which case there is no concern about nursing while the mother is on it.
Maybe it is a protein and will be destroyed in the baby's stomach.

The mother's health is important, but breastfeeding is too.
Breastfeeding may protect the child from developing multiple sclerosis
later.  Isn't that being taken into consideration?  Maybe there is an
answer here if we look.

Jack Newman, MD, FRCPC (who has never heard of this drug)