Thank you everyone for your suggestions!
I also have read about the low bioavailability of magnesium oxide, but that is the only form that my doctor recommends. I went to my local health food store and picked up some Mg oxide combined with Mg citrate. I am hoping that will help with the absorption. I also have cut out black tea and increased my water intake to combat the negative effects of cyclosporine on my kidneys. I already take Vitamin D supplements, but should probably recheck that level.
I will continue to eat a lot of nuts, greens, and chocolate
and will give the epsom foot baths a try.
I don't think I am ready to cut out the coffee, but am questioning whether I should be washing down my medications with a latte!
I'll let you know how it goes!