Phenytoin

ADMINISTRATION

The decision to use phenytoin and the exact protocol will depend on your clinical judgment in each specific situation. 

·         Maximum infusion rate: 50 mg/minute in adults (or 1-3 mg/kg/min)

·        Maintenance: Generally 4-7 mg/kg/day divided in 2-3 doses, adjusting according to serum levels and clinical response.

GENERAL CONSIDERATIONS

Monitoring:

·         Continuous ECG

·         Blood pressure

·         Serum phenytoin levels (therapeutic target: 10-20 μg/mL).

Considerations:

·         Adjust the dose in patients with hepatic or renal insufficiency.

·         Monitor possible drug-drug interactions

·         Watch for signs of toxicity (nystagmus, ataxia, dysarthria).

Contraindications:

·         Sinus bradycardia, AV block, Stokes-Adams syndrome or porphyria.

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