I tried gold coin grass, went through an entire bottle of tincture, but that was several weeks ago. Pain has returned. Am now trying chanca piedra and plan to do another flush after a while. Perhaps a couple-few weeks or months, depending on how I feel. Also doing a mostly raw diet including lots of juices, green smoothies and small amounts of high nutrient animal products like raw liver. It looks like as long as I keep protein and fat very low and carbs fairly low per unit of food (watery) I'm ok, for now. I will update this one way or the other.