This module on diuretics is intended for use in inservice or continuing education programs for persons who administer medications in long-term care facilities. Instructor information, including teaching suggestions, and a listing of recommended audiovisual materials and their sources appear first. The module goal and objectives are then provided. A brief discussion follows of the structure and function of the kidney, commonly used drugs from the diuretic group and their actions and implications in the treatment of congestive heart failure, and considerations and suggestions for resident care. This discussion is intended for use as a lecture or participant reading. Other contents include a vocabulary list, a worksheet, a chart of commonly used diuretics, and a diagram of the urinary system, all of which are suitable for reproduction for use as handouts. (YLB)