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Updated: Jun 22, 2026

High-throughput and Comprehensive Drug Surveillance Using Multisegment Injection-Capillary Electrophoresis-Mass Spectrometry
10:17

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Published on: April 23, 2019

Opioid metabolism

Howard S Smith1

  • 1Department of Anesthesiology, Albany Medical College, Albany, NY 12208, USA. smithh@mail.amc.edu

Mayo Clinic Proceedings
|July 2, 2009
PubMed

Insights

Patient response to opioid analgesics varies due to differences in metabolism. Understanding opioid metabolism factors is key to effective pain management and minimizing adverse drug interactions.

Area of Science:

  • Pharmacology
  • Pain Management
  • Drug Metabolism

Background:

  • Individual patient responses to opioid analgesics vary significantly.
  • Factors influencing opioid response include genetic variations and receptor binding profiles.
  • Altered opioid metabolism is a key contributor to variability in efficacy and tolerability.

Purpose of the Study:

  • To review the fundamentals of opioid metabolism.
  • To identify factors influencing opioid metabolic variability.
  • To provide recommendations for managing metabolic issues in pain management.

Main Methods:

  • Literature search of MEDLINE, EMBASE, and PubMed.
  • Inclusion of articles discussing opioid metabolism physiology, drug characteristics, patient factors, interactions, and adverse events.

Main Results:

  • Opioid metabolism is influenced by enzyme systems, genetic factors, race, and medical conditions (liver/kidney disease).
  • Drug interaction risk is determined by the metabolizing enzyme systems of opioids.
  • Metabolic variability impacts both the effectiveness and tolerability of opioid analgesics.

Conclusions:

  • Understanding opioid metabolism is crucial for optimizing pain management.
  • Addressing metabolic variability can improve analgesic efficacy and patient tolerability.
  • Recommendations are provided to guide clinicians in managing opioid metabolism-related challenges.

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