Yes, extremely allergic to all factions of cow's milk, plus I can't tolerate gluten in wheat, rye, barley, and oats because of celiac. It is possible that the thyroid med has something in it.. most likely lactose or wheat flour. I have run into this problem before, so you could be right. I will check this out. Thank-you for reminding me!
Sometimes it can be the inert ingredient .. are you allergic to anything?
C~