@gingerw, @sammyloue, after being on a fairly low dose of furosemide shortly after CKD diagnosis, after my eGFR dropped and I underwent a few months of dialysis then didn't need it any more, my Neph put me on 80 mg furosemide. Because I couldn't tolerate the powdered potassium supplement and my gastroparesis made my stomach upset with orange juice, etc., and the standard supplemental dose was too high for me, for awhile I used potassium chloride - sparingly in the form of Nu Salt (salt substitute.) My low potassium levels improved slightly. I slowly began substituting very small servings of higher potassium foods usually avoided with CKD like bananas, low sodium V8 juice, etc. with very good results. As Ginger knows, I calculate every calorie, phosphorus, potassium, sodium, protein, carb, fiber, and fat of every food I eat and so far about 1700-1800 mg potassium daily seems to be right for me at Stage 4 CKD. I am not advising anyone else to do this, just sharing my personal experience with furosemide and potassium supplementation.

Peace and blessings!