Evidence-based guidelines on the use of opioids in chronic non-cancer pain--a consensus statement by the Pain Association of Singapore Task Force

<p><b>INTRODUCTION</b>While opioids are effective in carefully selected patients with chronic non-cancer pain (CNCP), they are associated with potential risks. Therefore, treatment recommendations for the safe and effective use of opioids in this patient population are needed.</p><p><b>MATERIALS AND METHODS</b>A multidisciplinary expert panel was convened by the Pain Association of Singapore to develop practical evidence-based recommendations on the use of opioids in the management of CNCP in the local population. This article discusses specific recommendations for various common CNCP conditions.</p><p><b>RESULTS</b>Available data demonstrate weak evidence for the long-term use of opioids. There is moderate evidence for the short-term benefit of opioids in certain CNCP conditions. Patients should be carefully screened and assessed prior to starting opioids. An opioid treatment agreement must be established, and urine drug testing may form part of this agreement. A trial duration of up to 2 months is necessary to determine efficacy, not only in terms of pain relief, but also to document improvement in function and quality of life. Regular reviews are essential with appropriate dose adjustments, if necessary, and routine assessment of analgesic efficacy, aberrant behaviour and adverse effects. The reasons for discontinuation of opioid therapy include side effects, lack of efficacy and aberrant drug behaviour.</p><p><b>CONCLUSION</b>Due to insufficient evidence, the task force does not recommend the use of opioids as first-line treatment for various CNCP. They can be used as secondor third-line treatment, preferably as part of a multimodal approach. Additional studies conducted over extended periods are required.</p>

Oxycodone--an audit of its prescription in a local hospital

<p><b>AIM</b>This study aims to evaluate the prescription patterns and side effects of oxycodone in a local hospital setting.</p><p><b>MATERIALS AND METHODS</b>This is a retrospective analysis of all patients who were prescribed oxycodone for acute or chronic pain from June to November 2007. Patients' names were obtained from the hospital pharmacy and data were collected with a set of questionnaire after review of their casenotes. Prescription was compared with other recommended opioid prescription guidelines. Side effects to oxycodone use were documented.</p><p><b>RESULTS</b>One hundred and thirty patients were prescribed oxycodone for the 6-month study period. Prescription by the orthopaedic surgeons was the highest, followed by the pain service. Most patients had a clear indication for use of oxycodone and appropriate dosing regimes. However, two thirds of the patients prescribed oxycodone were not reviewed with regard to their analgesia within 24 hours and one third did not have titration of the drug to their pain symptoms. Majority of the patients had outpatient follow-up within 4 weeks of discharge. Common side effects included nausea, vomiting and constipation.</p><p><b>CONCLUSION</b>This is the first local audit that profiles oxycodone prescription patterns and its side effects. Prescription of oxycodone was appropriate for the majority of the study population. Patient assessment upon initiation of oxycodone therapy and titration of the drug to patients' pain symptoms was suboptimal. Oxycodone was well tolerated by the study population with minimal side effects. Further quality measures and ongoing education of clinicians will ensure future patients obtain safe and effective analgesia.</p>