I agree that you should not take calcium supplements, etc for 4 hours after taking
thyroid med; however, I'm not convinced that a bit of milk in your morning coffee is going to mess things up much, if at all.
Read the information sheet that came with
your cytomel. Mine says it can be taken "with
". Levothyroxine, which is a T4 med, should be taken on an empty stomach at least an hour before eating; however, I don't believe that holds true for cytomel.