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Parkinsonism and amiodarone therapy.

E G Werner1, C W Olanow

  • 1Department of Neurology, University of South Florida, Tampa 33606.

Annals of Neurology
|June 1, 1989
PubMed
Summary

Amiodarone can cause reversible parkinsonian tremor related to dosage. Discontinuing or reducing amiodarone dosage can resolve basal ganglia dysfunction, but prolonged use may lead to persistent issues.

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Area of Science:

  • Neurology
  • Pharmacology

Background:

  • Amiodarone is an antiarrhythmic drug with known neurological side effects.
  • Basal ganglia dysfunction is a potential adverse effect of amiodarone therapy.

Observation:

  • A patient developed reversible, dose-related parkinsonian tremor while taking amiodarone.
  • The tremor resolved upon dose reduction or discontinuation of the drug.

Findings:

  • Amiodarone-induced basal ganglia dysfunction is dose-dependent.
  • Reversibility of amiodarone-induced basal ganglia dysfunction is inversely related to the duration of therapy.

Implications:

  • Patients on amiodarone are at risk for developing basal ganglia dysfunction.
  • Early recognition and intervention (discontinuation or dose reduction) are crucial to prevent persistent neurological deficits.

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