Phenobarbitone (Luminal) | KK Women's and Children's Hospital

Specimen Container	Gel separator tube (Adult) Microtube (Paeds)
Specimen Requirement	Plain Blood Adult: 3 mL Paediatric: 1.3 mL
Specimen Storage/Transport	Transport will leave for SGH on Mon - Fri: 9 am & 3 pm Sat: 9 am & 11 am 11 am transport for urgent specimens only. Specimen received after these timing should be sent via urgent 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	Mon - Fri: 0800 hrs to 1700 hrs Sat: 0800 hrs - 1230 hrs
Orderable on CPOE?	Yes
Downtime Form	Clinical Chemistry - Form A
Additional Information	Due to Phenobarbital's long elimination half-life, the actual sampling time is unimportant. However while making comparative measurements, the sample time should be consistent.

Change History Notes

Last Updated - 24 Jul 2025