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Methadone-Related Delirium: Prevalence, Causes, and Outcomes

Joseph Westermeyer, Paul Thuras, Gihyun Yoon

  • 1Mayo Clinic School of Medicine, Rochester, Minnesota.

The Journal of Nervous and Mental Disease
|April 9, 2019
PubMed

Insights

Methadone-related delirium (MRD) affects 14 patients, often triggered by prescribing errors or misuse. Prompt recognition through serum methadone levels aids recovery, though some cases may progress to dementia.

Area of Science:

  • Clinical Toxicology
  • Addiction Medicine
  • Neuroscience

Background:

  • Methadone maintenance treatment is crucial for opioid use disorder.
  • Delirium can complicate treatment, impacting patient outcomes.
  • Understanding methadone-related delirium (MRD) is essential for safe patient management.

Purpose of the Study:

  • To determine the 5-year prevalence and recurrence of methadone-related delirium (MRD).
  • To identify the causes, treatments, and outcomes associated with MRD.
  • To evaluate the impact of social and employment factors on MRD.

Main Methods:

  • Retrospective analysis of 81 patients undergoing methadone maintenance treatment.
  • Defined MRD by high serum methadone levels and symptom resolution upon dose reduction.
  • Collected data on precipitants, social factors, employment, and clinical outcomes.

Main Results:

  • MRD occurred in 14 patients, with 25 episodes observed over 5 years.
  • Precipitants included physician prescribing errors, drug misuse, and renal-fluid imbalances.
  • Social support (family/partner) was linked to reduced MRD; employment was associated with increased risk.
  • 23 of 25 episodes resolved; 2 episodes progressed to dementia.

Conclusions:

  • MRD is a significant complication in methadone maintenance treatment.
  • Identifying and addressing precipitants, such as incorrect prescribing and drug misuse, is key.
  • Monitoring serum methadone levels facilitates early diagnosis and management.
  • Social support may be protective, while employment could increase risk, warranting further investigation.

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