This is a quantitative descriptive study that investigates the kinetics of salivary CPA in order to minimize the risk of CPA exposure after outpatient chemotherapy. Another aim is to document instructions for the prevention of exposure in the homes of the patients receiving outpatient chemotherapy. Materials and Methods Subjects and SettingPrior to the study, approval was obtained from the ethics committee of Ishikawa Nursing University (project registration number 561) and the 2 facilities that carried out the chemotherapy for breast cancer.We enrolled 31patients (age: 54.7 ± 10.5) who had been diagnosed with breast cancer more than one month previously, had received one cycle of chemotherapy (FEC, EC, CAF, AC treatment protocol