Not anymore, but when I was on it, I took it at a very low dose (6.25 mcg 2x a day). It is important that you start low to see how your body reacts to it, then work your way up if need be. I personally didn't have to since my RT3 ratio wasn't too bad to begin with.
I don't remember what they did to determine when and how to increase the dose but the info should be under the group files. They'll also help you out if you need any guidance.