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Related Experiment Videos

Phenytoin-induced parkinsonism.

S Ertan1, M O Ulu, H Hanimoglu

  • 1Department of Neurology, Cerrahpasa Faculty of Medicine, Istanbul University, PK 4 Cerrahpasa 34301, Istanbul, Turkey.

Singapore Medical Journal
|November 1, 2006
PubMed
Summary

This case report details a reversible instance of cerebellar ataxia and parkinsonism caused by phenytoin toxicity in a patient with brain injury. The neurological symptoms resolved after discontinuing the anti-seizure medication.

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Area of Science:

  • Neurology
  • Neuropharmacology

Background:

  • Phenytoin is an anticonvulsant medication commonly used for seizure prophylaxis.
  • Head trauma can lead to intracerebral hemorrhage, necessitating treatments like seizure prophylaxis.

Observation:

  • A 30-year-old male developed subacute cerebellar ataxia and parkinsonism.
  • These neurological symptoms emerged after initiating phenytoin for seizure prophylaxis following bilateral intracerebral orbitofrontal hemorrhage due to head trauma.

Findings:

  • The patient's cerebellar ataxia and parkinsonism resolved completely after discontinuing phenytoin treatment.
  • This case adds to the limited reports of reversible parkinsonism associated with phenytoin toxicity, particularly in the context of orbitofrontal lesions.

Implications:

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  • Phenytoin toxicity should be considered in patients presenting with cerebellar ataxia and parkinsonism, especially those with pre-existing brain lesions.
  • This highlights the importance of monitoring for neurological side effects of phenytoin, even in patients with traumatic brain injury.
  • Further investigation into the relationship between orbitofrontal lesions and phenytoin-induced parkinsonism is warranted.