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Massive baclofen overdose.

D J Cooper1, J Bergman

  • 1Department of Intensive Care and Hyperbaric Medicine, The Alfred Hospital, Melbourne, Victoria. djamiec@ozemail.cam.au

Critical Care and Resuscitation : Journal of the Australasian Academy of Critical Care Medicine
|April 8, 2006
PubMed
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This case report details a massive baclofen overdose, noting record blood concentrations and unique symptoms like shock. The patient experienced slow cerebral recovery, followed by fatal arterial hemorrhages potentially linked to baclofen toxicity.

Area of Science:

  • Toxicology
  • Clinical Medicine
  • Pharmacology

Background:

  • Baclofen is a muscle relaxant with a narrow therapeutic index.
  • Overdose can lead to severe central nervous system and cardiovascular effects.
  • Massive baclofen overdose cases are rare, with limited data on extreme concentrations.

Purpose of the Study:

  • To report a unique case of massive baclofen overdose.
  • To document clinical manifestations and highest reported blood baclofen concentrations.
  • To explore potential complications of extreme baclofen toxicity.

Main Methods:

  • Case presentation of a patient with massive baclofen overdose.
  • Clinical observation of patient's neurological and cardiovascular status.
  • Analysis of blood baclofen concentrations and cause of death.

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Main Results:

  • Profound hypotension, distributive shock, and absent brainstem reflexes were observed.
  • Cerebral recovery was slow but ultimately complete.
  • Death occurred due to splenic and aortic arterial hemorrhage attributed to cystic medial necrosis.

Conclusions:

  • Massive baclofen overdose can present with severe, life-threatening clinical features.
  • Cystic medial necrosis leading to arterial hemorrhage may be a previously unreported complication of extreme baclofen toxicity.
  • This case highlights the critical need for close monitoring in severe baclofen overdose.