RecruitingDevice studyOpioid Dispensing Device for Post-Operative Pain in Cancer PatientsThis research study will evaluate the use of, and participants experience with, a new device called Addinex that safely stores and dispenses opioid medication. The purpose of this study is to evaluate the use of the Addinex device in cancer patients undergoing cancer-related surgery that require pain control with opioids after the surgery. Participants will be asked to answer questions about their medical history and background, fill out questionnaires, use a mobile application associated with the device, and undergo a phone interview one month after stopping use of the device. This study aims to find out how participants like using the Addinex device as opposed to a traditional pill bottle. Results of this study will help determine if the Addinex device could be useful to patients in the future after surgeries, as opposed to typical pill bottles.