Spironolactone is one of the diuretics, which has been included in doping list S5 of diuretics and other masking agents of WADA. Athletes and sport stakeholders should learn more about doping to avoid misuse. Spironolactone is the blocker for androgenic hormone receptor and has been widely used for the acne (pimples) treatment in female. The chance of spironolactone misuse in female athletes is higher than that of male. Even very small quantities can be detected. Therefore, it is very important for athletes to apply Therapeutic Use Exemption before they use.