[Opioid induction using rapid release drugs and the shift to fentanyl patches].

Subject And Methods: From April 2011 to March 2013, 20 patients with cancer pain that was not controlled by non-opioid analgesics were treated with a short-acting opioid for cancer pain management.The primary carcinoma sites were the stomach( n=5), colo-rectum(n=5), lungs(n=3), urinary bladder(n=2), breast(n=2), pancreas(n=2), and liver(n=1). The analgesic effects and adverse events were evaluated, and a shift to fentanyl patches was made for patients whose cancer pain was relieved.