Methadone analgesia in the critically ill.

Area of Science:

• Critical Care Medicine
• Pharmacology
• Pain Management

Background:

• Methadone is increasingly utilized in intensive care units (ICUs) for analgesia and as a transition from other opioid and sedative medications.
• Understanding methadone's pharmacology is crucial for its safe and effective application in critically ill patients.

Purpose of the Study:

• To review the pharmacology of methadone.
• To summarize current evidence on methadone's efficacy and safety in the ICU.
• To provide recommendations for methadone use and monitoring in critically ill populations.

Main Methods:

• A comprehensive PubMed search was conducted for articles on methadone's efficacy, safety, and pharmacology up to June 2015.
• References from selected studies were reviewed for additional relevant information.
• Inclusion criteria focused on experimental and observational English-language studies involving critically-ill adults and children.

Main Results:

• Methadone, a synthetic opioid analgesic, presents potential benefits over other commonly used opioids.
• Limited evidence suggests methadone protocols may facilitate opiate infusion weaning in pediatric, adult, and burn populations.
• Potential benefits include reduced mechanical ventilation duration and decreased incidence of negative outcomes like opiate withdrawal, delirium, and over-sedation.

Conclusions:

• Current literature supports methadone's role in opiate weaning and potentially shortening mechanical ventilation duration in critically ill patients.
• Further studies are required to validate these benefits.
• Establishing clear criteria for patient selection is essential for optimizing methadone therapy.