Phenytoin (Dilantin)

BD0062

Synonym(s):
Specimen Container
Gel separator tube (Adult)
Microtube (Paeds)
Specimen Requirement
Plain Blood
Adult: 3 mL
Paediatric: 1.3 mL
Specimen Storage/Transport

​Spin down and separate serum. Sample should be kept refrigerated (2-8°C).


Stability: 1 Month

Orderable as Urgent? No
Turn Around Time
Average: 4 hrs ( 3 - 5 hrs )
Testing Laboratory Location SGH
Laboratory Biochemistry
Contact Number 6394 1352
Day and Time Performed
Daily, 24 hrs
Orderable on CPOE? Yes
Downtime Form

Document Title

Additional Information
Trough levels (just before next dose)should be monitored.For suspected toxicity, draw specimen 3-9 hrs after last dose (time depends on a total drug dose.)

Change History Notes

  • 04 Mar 2025 10:00 AM

    Updated Specimen storage and transport.

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Last Updated - 21 Jun 2025