Hi Llewanda!
You really know your stuff, don't you. There's usually not much I can suggest that you have not already thought of. I agree that the improvements you've seen as well as the response to the diuresis in October make this a Rehmannia case. The BUN and creat always have to be interpreted in light of the USG. If it was higher more recently, then the BUN and creatinine may actually be stable or even improved.
For sure, given these results, we should stay away from XCHT, since its renal decongesting effects will reduce renal blood flow, and the improvements are too broad-based with your use of the opposite strategy to believe that is what is needed. So we have three options:
- Boost the dose of Rehmannia Eight
- Try Yi Guan Jian (which has proportionately more Rehmannia, as well as Dang Gui, which also boosts renal blood flow)
- Introduce San Ren Tang
Any or all of these may help. I'd try them before going in the Minor Bupleurum direction.
Hope that helps!
Steve