Test Code VPA Valproic Acid

Important Note

Trough: Collect sample just before next dose.

Peak: Serum Valproic Acid level that best represents the peak tissue level should be drawn 1-3 hours after oral dose is given.

General Hospital Laboratory	304-388-6244
Women and Children's Hospital Laboratory	304-388-2385
Teays Valley Hospital Laboratory	304-757-1770
Greenbrier Valley Laboratory	304-647-6060

Preferred: Plasma-Dark Green Lithium Heparin or Serum- red top

Acceptable: Plasma-Mint Green or Serum-SST gold top

Allow SST or red top to completely clot

Spin and physically separate plasma/serum from contact with cells as soon as possible

4 mL of plasma/serum (minimum 2 mL)

50-100 ug/mL

Critical Value: >149 ug/mL

Homogeneous Enzyme Imunoassay	General, Women and Children's, Teays
Two-Point Rate	Greenbrier

Monday through Sunday, Continuously

AM Collection	Expected by 9AM same day
Routine	Expected within 24 hrs
Stat	Expected within 1 hr
Timed	Expected results are test dependant

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