Analgesic Efficacy and Safety of Prolonged-Release Oxycodone/Naloxone in Korean Patients with Chronic Pain from Spinal Disorders.
Background
A prolonged-release formulation of oxycodone/naloxone has been shown to be effective in European populations for the management of chronic moderate to severe pain. However, no clinical data exist for its use in Korean patients. The objective of this study was to assess efficacy and safety of prolonged-release oxycodone/naloxone in Korean patients for management of chronic moderate-to-severe pain.


Methods
In this multicenter, single-arm, open-label, phase IV study, Korean adults with moderate-to-severe spinal disorder-related pain that was not satisfactorily controlled with weak opioids and nonsteroidal anti-inflammatory drugs received prolonged-release oral oxycodone/naloxone at a starting dose of 10/5 mg/day (maximum 80/40 mg/day) for 8 weeks. Changes in pain intensity and quality of life (QoL) were measured using a numeric rating scale (NRS, 0-10) and the Korean-language EuroQol-five dimensions questionnaire, respectively.


Results
Among 209 patients assessed for efficacy, the mean NRS pain score was reduced by 25.9% between baseline and week 8 of treatment (p < 0.0001). There was also a significant improvement in QoL from baseline to week 8 (p < 0.0001). The incidence of adverse drug reactions was 27.7%, the most common being nausea, constipation, and dizziness; 77.9% of these adverse drug reactions had resolved or were resolving at the end of the study.


Conclusions
Prolonged-release oxycodone/naloxone provided significant and clinically relevant reductions in pain intensity and improved QoL in Korean patients with chronic spinal disorders. (ClinicalTrials.gov identifier: NCT01811238).
['Hwang|Chang Ju|CJ|', 'Chung|Sung Soo|SS|', 'Lee|Kyu-Yeol|KY|', 'Lee|Jae Hyup|JH|', 'Moon|Seong-Hwan|SH|', 'Kim|Jin-Hyok|JH|', 'Cho|Kyu-Jung|KJ|', 'Ahn|Jae-Sung|JS|', 'Kim|Dong-Soo|DS|', 'Park|Ye-Soo|YS|', 'Park|Hye-Jeong|HJ|']
D000368:Aged D000701:Analgesics, Opioid D001416:Back Pain D059350:Chronic Pain D003248:Constipation D003692:Delayed-Action Preparations D004244:Dizziness D004338:Drug Combinations D005260:Female D006801:Humans D057194:Intention to Treat Analysis D008297:Male D008875:Middle Aged D009270:Naloxone D009325:Nausea D010098:Oxycodone D010147:Pain Measurement D011788:Quality of Life D056910:Republic of Korea D012720:Severity of Illness Index D013122:Spinal Diseases
Chronic pain Analgesia Oxycodone naloxone combination Spine