A Prospective Multicentre Study to Evaluate the Efficacy and Tolerability of Osmotic Release Oral System (Oros®) Hydromorphone in Opioid-Naive Cancer Patients: Results of the Korean South West Oncology Group Study

BACKGROUND: Osmotic release oral system (OROS®) hydromorphone is a potent, long-acting opioid analgesic, effective and safe for controlling cancer pain in patients who have received other strong opioids. To date, few studies have examined the efficacy of hydromorphone for pain relief in opioid-naive cancer patients.