Hi Marc,
Unfortunately, there is a known link between Cyclosporine and low magnesium levels. My magnesium level wasn't tested until 2 years post-ATG when I was having unexplained muscle cramping. I have been taking Magnesium Oxide ever since. When I was off cyclosporine for 6+ months, my magnesium levels remained low- possibly suggesting structural kidney changes due to my long term cyclosporine use.
Attached is an interesting paper on this topic. The article does mention that IV magnesium replacement typically only lasts 3-4 days.
How low are your magnesium levels? Are you on a high dose of cyclosporine? Unfortunately, this article mentions that Tacrolimus can also lead to hypomagnesemia.
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58 yo female, dx 9/08, AA/hypo-MDS, subclinical PNH, ATG/CsA 12/08, partial response. small trisomy 6 clone, low-dose cyclosporine dependent
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