PHENYTOIN, FREE (DILANTIN, FREE)
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.
Room Temp: 4 days; Refrigerated: 7 days; Frozen: 1 month
2 days Setup Mon-Sat PM