• Philippe Richebé and Pierre Beaulieu.
• Department of Anesthesiology and Pain Medicine, University of Washington Medical Center, Seattle, WA 98195, USA. prichebe@u.washington.edu
• Can J Anaesth. 2009 Dec 1;56(12):969-81.

PurposeThe objective of this continuing professional development module is to describe the perioperative anesthesia and pain management of patients taking opioids because of chronic pain or drug addiction.Principal FindingsThe number of patients under opioid treatment is increasing. Pain management is problematic in these patients, because regular opioid intake is associated with mechanisms of tolerance and dependence. More recently, opioid-induced hyperalgesia phenomena have been brought to light. As a rule, the usual opioid dose should be administered with the appropriate conversions, and additional requirements should be anticipated because of the surgical procedure. Local and regional anesthesia, and multimodal analgesia are indicated whenever possible. For the patient addicted to heroin or other opioids, the perioperative period is not a suitable time to initiate weaning.ConclusionThe physiological and pharmacological changes caused by chronic opioid intake must be understood in order to provide optimal pain management with respect to each individual and the type of procedure.

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