Item Value
Test name Primidone
Available Stat? No
Turn around times Test performed Monday-Saturday. Turnaround time: 1-4 days.
Performed by Quest
Normal range Primidone:
Therapeutic: 5-15 mg/L
Potentially toxic: > 15 mg/L

Phenobarbital:
15.0-40.0 mg/L
Container type Red top (Gold top NOT acceptable), Lavender OK
Amount to Collect 4 mL blood
Collection Instructions Time to steady state: 2-3 days.

A trough levels is ideally drawn < 1 hour before the next dose.

Indicate the time of draw on the requisition.
Sample type Serum (EDTA plasma acceptable)

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