@blueberre is it possible that your dosage of synthroid can be adjusted…my doc has kept mine quite low in recent years (even has me split a pill so I get 1/2 dose 2x a week) and thyroid levels are fine…sometimes the dose we start on is too high as we age…? all a big question as I am not a doctor ! There are different forms of calcium, another area to explore- some may be better absorbed, easier on the gut. It gets complicated if someone is taking a lot of meds…good luck to all !!