Reference Interval:
| Test Number
| Components
| Reference Interval
| | 0090230 | Phenobarbital
| 0-2 months: 15.0-30.0 µg/mL
Toxic: 40.1 µg/mL or greater
3 months and older: 15.0-40.0 µg/mL
Toxic: 50.1 µg/mL or greater
| | | Primidone | 5-12 µg/mL
|
|
| Interpretive Data: |
Primidone concentrations greater than 15 µg/mL in conjunction with therapeutic levels of phenobarbital may be associated with toxicity.
|
| CPT Code(s): |
80188 Primidone; 80184 Phenobarbital
|
Cross References: |
Mysoline (Primidone & Metabolite) |