The kidney cleansing herbs also have the effect of gently cleansing the intestinal tract. Normally, people don't notice this, though. If you develop gas, bloating, fullness and cramping it is not due to the herbs as such, but due to what they loosen up and try to remove. To minimize this response, it would be good if you thoroughly cleanses the intestines first, before commencing the kidney cleanse. You might also want to reduce the amount of herbs to half, or avoid soaking them over night and simply add the herbs to boiled water in the morning and strain after 10-15 minures. Diluting the tea with 1-2 cups of water may also help.