title: The long-term safety and efficacy of opioids: a survey of 84 selected patients with intractable chronic noncancer pain.
abstract: BACKGROUND
  The use of opioids for chronic noncancer pain (CNCP) remains controversial. Despite a number of randomized controlled trials showing efficacy and safety in the short term, long-term data are limited.
  
  
  OBJECTIVE
  To survey a selected cohort of patients with intractable CNCP with regard to long-term efficacy and safety of opioids.
  
  
  METHODS
  The present study reports long-term results from a survey of 84 patients with CNCP. The majority of patients had neuropathic pain, were treated with opioids and were followed every three months for a median of 8.4 years. Outcomes examined were pain severity, adverse effects, pain relief, satisfaction, mood, problematic opioid use, tolerance, physical dependency, functional status, health-related quality of life, immune status, sexual function, morbidity and mortality. Measures included a numerical rating scale, the Hospital Anxiety and Depression Scale, Brief Pain Inventory interference scale, Pain Disability Index and Short-Form Health Survey 12, version 2.
  
  
  CONCLUSIONS
  Both long- and short-acting opioids were reported to be effective, with few significant long-term adverse effects in many subjects in the present selected cohort. The majority of patients reported at least 50% or greater pain relief and a moderate improvement in disability. Functional status and health-related quality of life scores were not severely affected. Problematic opioid use, tolerance and serious adverse effects, including constipation, were not major issues. The authors emphasize that the results obtained in the present selected group may not be generalizable to all CNCP patients in whom opioids are being initiated.
authors.affiliation: Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. peter.watson@utoronto.ca
authors.forename: C Peter N
authors.initials: CP
authors.lastname: Watson
authors.forename: Judy
authors.initials: J
authors.lastname: Watt-Watson
authors.forename: Mary
authors.initials: M
authors.lastname: Chipman
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000701:Analgesics, Opioid / Q000627:therapeutic use*; D002908:Chronic Disease; D004185:Disability Evaluation; D004305:Dose-Response Relationship, Drug; D005260:Female; D006306:Health Surveys; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D019370:Observation; D010146:Pain / Q000188:drug therapy* / Q000523:psychology; D010147:Pain Measurement; D011788:Quality of Life; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D000701:Analgesics, Opioid
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