Phenytoin, Free (Dilantin, Free)

Specimen Serum
Container Type Red/Gray Stopper Top Tube

Stability 7 days
Turnaround Time 2-5 days
Methodology Ultrafiltration/Immunoassay
Reference Range 1.0-2.0 mg/L
Transport Temp Refrigerate 2°-8°C
Instructions
Collect as trough just prior to next dose. For patients receiving fosphenytoin therapy, collect as trough at least 2 hours after IV infusion or at least 4 hours after intramuscular (IM) injection.

Alternative name: Free Dilantin

CPT Code 80186