Specimen Requirements

Collect peak blood levels at 3 hours after the last dose; collect trough blood levels just before the next dose is given. A Phenobarbital Level is included in the Primidone Test Order. Phenobarbital is a Metabolite of Primidone.

Container/Tube Type: 

Red (No Additive)
Green (Lithium Heparin)
Lime Green (Heparin Plasma Separator Tube)

Also Acceptable Collection Container: 

Plasma from Lavender tubes is acceptable but will not route in the Laboratory Information System (Sunquest).

Transport Information: 

1.0 mL blood/0.4 mL serum