There is a reference (out of print right now) on this.

But there are links to abbreviated data from that reference.
There is even a smart phone app for this subject now;

Here are the links:

http://www.chiro.org/nutrition/ABSTR...orticosteroids

http://itunes.apple.com/us/app/nutri...432547190?mt=8

Neither one of these is 100% inclusive, but the Drugs.com link has improved significantly in the past year... so it has food interactions too.

Depletions lead to drug interactions or failures. That is a bit different in thrust, but still very important.

Magnesium is thought to be low in at least 70% of people in the US.... it is significant even when no drugs are at fault.
And for any diabetic ...magnesium is ALWAYS significant.

Magnesium depletion was the major reason Propulsid was recalled...and Propulsid remains the best treatment to date for gastroparesis... a very sad situation for many many patients, that the doctors refused to follow FDA warning letters in its use! IMO.

I have a magnesium thread here:
http://neurotalk.psychcentral.com/showthread.php?t=1138

And I'll share some new info... CVS Epsom lotion is a nice product, very affordable and applies to skin providing some magnesium for muscles and cramping. I am using it now instead of some of my oral supplements. You might want to check it out: (unfortunately they don't provide dosing or quantity, but it seems to do the job when used on legs or arms for me.)

http://www.cvs.com/CVSApp/catalog/sh...new_crumb=true

I get it locally, and this link, has price changes every week it seems for "sales" stimulus etc.