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Phenytoin, Total, Serum

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Phenytoin, Total, Serum

Accredited Facility E-report Qualified Specialists

This test measures total blood levels of Phenytoin. It helps monitor treatment effectiveness, maintain therapeutic drug levels, and detect toxicity or inadequate dosing in seizure management.

  • During phenytoin therapy monitoring
  • When adjusting medication dosage
  • If seizure control changes
  • If toxicity symptoms occur (dizziness, confusion, coordination problems)
  • During routine therapeutic drug monitoring
  • Blood sample is usually collected just before the next dose (trough level)
  • Take medication exactly as prescribed unless instructed otherwise
  • Inform the laboratory about timing of the last dose
  • Do not change medication schedule before testing
  • Follow all laboratory and physician instructions carefully
    • Phenytoin, Total, Serum
    No labs currently offering this test.