Julie,
Synthroid is one drug that is notorious for wide swings in bioavailability
from batch to batch. Postpartum is also a time of metabolic change. When has
this mom had her synthroid dosage adjusted last? She could need a higher dose
to make adequate milk. Is she having other symptoms that might confirm or
refute the need for more medication?
Catherine Watson GEnna, IBCLC NYC [log in to unmask]