Item Value
Test name Valproic acid
Available Stat? Yes
Turn around times Stat 1 hour, Routine 4 hours
In House Availability Test available 24 hours per day 7 days per week
Performed by Parnassus & Mission Bay Chemistry
Normal range
Therapeutic 50-125 mg/L


VPA therapeutic range of 50 - 125 mg/L was set based on recommendations in the literature and consultations with UCSF pharmacists and neurologists.
Source: Valproate: Drug information copyright 1978-2012, Lexicomp, Inc. Accessed at UpToDate www.uptodate.com August 2012.
Container type Gold top or Light Green top
Amount to Collect 1 mL blood
Collection Instructions Time to steady state: 2-3 days.

Collect trough samples 30 minutes before next dose.
Sample type Serum or plasma

If you have additional questions regarding this test, please call: 415-353-1667