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HelpOrder Code Phenobarb Phenobarbital Level
Additional Codes
Epic Order ID LAB2270
Sub activity Type
Chemistry
Collection tube (preferred)
Green Li PST
Specimen Type
Plasma/Serum
Minimum Volume
0.6 ml
Stability
2 days at 2-8°C
8 hours at room temp (20-23°C)
Transport Container
Plasma Separator Tube(PST) or Serum Separator tube (SST)
Rejection Criteria
Anticoagulants other than heparin
Acceptable collection tube
SST
Clinical Significance
Phenobarbital is an anticonvulsant used for the long-term treatment of generalized tonic-clinic (grand mal) seizures and cortical focal seizures. Phenobarbital levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.
Reference Range
Cedar Falls / Oelwein: 10 - 30 ug/mL
Waterloo: 15 - 40 ug/mL
Critical Values
Waterloo: ≥ 40.0 ug/mL