Valproic acid

Tube Type

Test ID   LAB24
EPIC Order
CPT Code(s)   80164
Group/Individual Test   Individual
Laboratory   Core Laboratory
Tube Station   Routine: 30; STAT: 888
Specimen Routine: 2 mL blood/royal blue top tube or plain red top tube (no gel); see Comments
  micro: 300 µL blood/red top (no gel) bullet; see important Comments
Unspun: 24 hours
Spun/separated, Room Temperature: 8 hours
Spun/separated, Refrigerator: 2 days
Spun/separated, Frozen: 30 days
Availability 24 hours/day
Turnaround Time   Routine: 2 hours; STAT: 1 hour
Reference Range Therapeutic: 50-100 µg/mL (trough, steady state)
  Toxic: >200 µg/mL
--Collection information: Use trough levels for routine monitoring
--Collect immediately before next dose
--Red top tubes must NOT contain Serum Separator Gel
Reference Range effective 4-5-2010.

Reviewed by jcayless on January 06, 2022

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514