INTRODUCTIONThe use of opioids in chronic non-cancer pain (CNCP) is controversial, as it presents both benefits and risks. There is currently no available data on the incidence, prescription pattern, functional outcomes and adverse effects of opioids in patients with CNCP in Singapore. This study aimed to address the aforementioned deficit.

METHODSAll records of patients who were prescribed strong opioids (for > 3 months per year) for the management of CNCP over a two-year period were retrospectively analysed. Factors including type of opioid, indications for opioid prescription, uncontrolled side effects, functional status, coexisting psychological issues and suspicion of aberrant drug-seeking behaviour were studied.

RESULTSOut of the 1,389 new patients who visited the centre, 42 (3.0%) with CNCP received strong opioids for more than three months a year. The most commonly prescribed opioid was methadone (42.9%). The principal diagnosis for opioid prescription was spinal pain (38.1%). Ten patients had severe side effects. 15 patients saw improvement in activities of daily living scores. Although ten patients returned to work, one stopped following the commencement of opioids. Aberrancy was seen in 5 (11.9%) patients, while 19 (45.2%) had psychological issues and 10 (23.8%) required psychiatric co-management.

CONCLUSIONOpioids are not a panacea for chronic pain. Therefore, functional outcomes should be considered more important end points than mere reductions in pain scores. A multidisciplinary team approach is essential for the effective management of patients with CNCP who are on opioids.

Adult ; Aged ; Aged, 80 and over ; Analgesics, Opioid ; administration & dosage ; Chronic Pain ; diagnosis ; drug therapy ; etiology ; Dose-Response Relationship, Drug ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Pain Clinics ; statistics & numerical data ; Pain Measurement ; Prescription Drugs ; Retrospective Studies ; Singapore ; Treatment Outcome ; Young Adult

INTRODUCTION: Epidural steroid injections are an integral part of nonsurgical management of radicular pain from lumbar spine disorders. We studied the effect of dexamethasone 8 mg epidural injections on the hypothalamic-pituitary-adrenal axis and serum glucose control of Asian patients. METHODS: 18 patients were recruited: six diabetics and 12 non-diabetics. Each patient received a total of dexamethasone 8 mg mixed with a local anaesthetic solution of lignocaine or bupivacaine, delivered into the epidural space. Levels of plasma cortisol, adrenocorticotropic hormone (ACTH), serum glucose after an overnight fast and two-hour postprandial glucose, as well as weight, body mass index, blood pressure and heart rate were measured within one week prior to the procedure (baseline) and at one, seven and 21 days after the procedure. RESULTS: Median fasting blood glucose levels were significantly higher on post-procedure Day 1 than at baseline. However, there was no significant change in median two-hour postprandial blood glucose from baseline levels. At seven and 21 days, there was no significant difference in fasting or two-hour postprandial glucose levels. Both ACTH and serum cortisol were significantly reduced on Day 1 compared to baseline in all patients. There was no significant difference in ACTH and serum cortisol levels from baseline at Days 7 and 21. CONCLUSION Our study shows that epidural steroid injections with dexamethasone have a real, albeit limited, side effect on glucose and cortisol homeostasis in an Asian population presenting with lower back pain or sciatica.
Adrenocorticotropic Hormone ; blood ; Adult ; Aged ; Blood Glucose ; analysis ; Body Mass Index ; Dexamethasone ; administration & dosage ; therapeutic use ; Diabetes Mellitus ; therapy ; Endocrine System ; drug effects ; Female ; Glucocorticoids ; administration & dosage ; Humans ; Hydrocortisone ; blood ; Hypothalamo-Hypophyseal System ; drug effects ; Injections, Epidural ; methods ; Male ; Middle Aged ; Pituitary-Adrenal System ; drug effects ; Postprandial Period ; Singapore ; Young Adult