Objective: To explore the application and adverse reactions of morphine sulfate sustained-release tabelets in the treatment of moderate and severe cancer pain. Methods: The data of 67 cases from january 2014 to january 2016 in The First Affiliated Hospital of Xi'an Jiaotong University in Department of Rehabilitation Medicine,advanced cancer patients and in severe pain the clinical data was retrospectively analyzed,according to the different treatment will divided into the experimental group and the control ...