Optimize drug therapy and monitor patient adherence.
Quantitative Enzyme Immunoassay
Timing of specimen collection: Pre-dose (trough) draw - At steady state concentration.
Plain Red. Also acceptable: Lavender (K2or K3EDTA) or Pink (K2EDTA).
Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution).
After separation from cells: Ambient: 5 days; Refrigerated: 1 week; Frozen: 2 months
|Ethosuximide||Therapeutic: 40-100 µg/mL
Toxic: > 150 µg/mL
The therapeutic range is based on serum pre-dose (trough) draw at steady-state concentration. Toxic concentrations may cause dizziness, drowsiness and anorexia. The incidence of adverse reactions is low; however, life-threatening agranulocytosis and fatal pancytopenia have been reported.
|Component Test Code*||Component Chart Name||LOINC|