Drain DampnessHealth Concerns Drain Dampness maintains overall well being. Contains wu ling san which is a blend of five herbs that might act to alleviate certain symptoms associated with water retention. Could potentially work to stimulate urine production by serving as mild diuretics. *These statements have not been evaluated by the U. S. Food and Drug Administration. This product is not intended to treat, mitigate, diagnose or cure any disease.