Specimen Requirements

Title

PHENYTOIN, FREE (DILANTIN, FREE)

Specimen Requirement

Collect as a trough just prior to next dose. For patients receiving fosphenytoin therapy, collect peak (at least 2 hours after IV infusion or at least 4 hours IM injection).

1-Plain Red top/1 mL serum. Spin, separate and send refrigerated.

 

Methodology

Stability

Room Temp: 4 days; Refrigerated: 7 days; Frozen: 1 month

Reference Range

By Report*

Turnaround

2 days Setup Mon-Sat PM

Clinical Use

Test Code

FDILS