Laboratory: Clinical Biochemistry
Test Name:
Test Code: PHEN
Clinical Information:
Since phenobarbital is a metabolite of primidone and mephobarbital, it will be measured when either of these parent drug levels is ordered. 
For more information see:
Collection Devices:
Do not use separator gel.
Specimen Required:

Plasma: 2.0 mL

Serum collected without gel is also acceptable.
Reference Values:
Therapeutic:       15-30 mg/L
Toxic:                  >40 mg/L                 (mg/L = μg/mL)
Stat or Routine
See Also:
More Information:
Li Heparin, NO GEL 4.0 mL Tube(s) - Full Tube Collection
Manufacturer: BD (Becton Dickinson)

Catalogue #: 367884