On February 28, 2019, the Centers for Disease Control and Prevention (CDC) clarified its opioid prescribing guidelines issued in 2016 to emphasize that physicians should use their "clinical judgment" when treating people with chronic pain conditions. In a letter to interested physicians at the National Comprehensive Cancer Network, the American Society of Clinical Oncology, and the American Society of Hematology, the CDC recommended that opioid prescribing may still be the correct therapy for some health care consumers. This is especially true in cases of those undergoing cancer treatment, cancer survivors who have chronic pain, and those with sickle cell disease . . .