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Complications of baclofen overdosage
Postgraduate Medical Journal
|December 1, 1980
Summary
A patient experienced severe central nervous system depression and respiratory failure after a baclofen overdose. Despite initial recovery, delayed sinus tachycardia occurred, highlighting potential long-term baclofen toxicity risks.
Area of Science:
- Pharmacology
- Clinical Toxicology
Background:
- Baclofen is a muscle relaxant commonly prescribed for spasticity.
- Overdose can lead to significant central nervous system and respiratory depression.
Observation:
- A patient presented with coma, flaccidity, and respiratory failure 12 hours post-baclofen overdose (450 mg).
- The patient later developed muscle twitching and epileptic seizures.
- Sinus tachycardia emerged approximately 65 hours after the overdose.
Findings:
- Plasma baclofen concentrations were within the therapeutic range on days 2 and 3 post-overdose.
- The elimination half-life of baclofen was observed to be prolonged.
- Sinus tachycardia was successfully managed with propranolol.
Implications:
- This case highlights the potential for delayed complications, such as sinus tachycardia, following baclofen overdose.
- Prolonged baclofen elimination half-life may contribute to sustained toxicity.
- Careful monitoring for delayed adverse effects is crucial in baclofen overdose management.
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