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Related Experiment Videos

Controlled release drugs in overdose. Clinical considerations

N A Buckley1, A H Dawson, D A Reith

  • 1University of Newcastle, New South Wales, Australia.

Drug Safety
|January 1, 1995
PubMed
Summary

Controlled-release formulation overdoses present with delayed effects, requiring extended observation. Standard treatment nomograms are unsuitable; gastrointestinal decontamination and monitoring are crucial for managing these prolonged toxic exposures.

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Area of Science:

  • Toxicology
  • Clinical Pharmacology

Background:

  • Overdoses involving controlled-release formulations (CRFs) exhibit unique pharmacokinetic profiles.
  • Delayed absorption and prolonged drug levels necessitate distinct management strategies compared to standard formulations.

Purpose of the Study:

  • To characterize the clinical presentation and management of overdoses involving CRFs.
  • To highlight the inadequacy of standard treatment protocols for CRF overdoses.

Main Methods:

  • Review of clinical characteristics and outcomes in patients with CRF overdoses.
  • Discussion of appropriate gastrointestinal decontamination techniques and monitoring strategies.

Main Results:

  • CRF overdoses are associated with delayed onset of clinical effects, potentially up to 16-20 hours post-ingestion.

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  • Absorption can persist for over 24 hours, leading to prolonged elevated drug concentrations.
  • Pharmacobezoar formation is a significant concern, requiring specific diagnostic and therapeutic approaches.

    • Conclusions:

    • Management of CRF overdoses requires extended observation periods and specialized decontamination protocols.
    • Standard treatment nomograms are inappropriate; whole bowel irrigation and endoscopic interventions may be necessary.
    • Vigilance for pharmacobezoars is essential for effective treatment of these complex overdoses.