It's dangerous to supplement with only T3, I definitely wouldn't recommend it sounds like you're not going to do it anyways.
http://www.tiredthyroid.com/rt3-2.html
http://www.tiredthyroid.com/rt3-8.html
You try to find what's causing it and then heal the issue. I know that isn't much help but essentially that's what you have to do.Vince, how does one treat elevated Reverse T3 without using T3 med, cytomel only and when iron and ferritin are well withing healthy ranges.....just curious since there is conflicting advice. Dr. Childs advocates flushing out the high RT3 with T3 meds....