kochac

tarnalberry - that's a good point, too. I was taking a different calcium supplement before so I don't think it's the Ca, but I switched to Caltrate to get additional minerals as well, so maybe it is the Mg...that would make some sense. Although I still hope it was a reaction to something else entirely so that I don't have to waste this whole bottle of pills...

Interesting that this should come up right now...Caltrate is on the gluten-free list at glutenfreedrugs.com and it looks to be gluten-free (they actually list "corn starch" as an ingredient so I'm guessing that's their binder), but I just started taking it and it seemed like it was making me sick, so I've stopped for now...once I feel 100% better I'll go...