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Ethosuximide (Inactive as of 05/19/14:  Refer to 2010358)
0090415
Ordering Recommendation
Mnemonic
ETHSUX
Methodology
Enzyme Immunoassay
Performed
Tue, Wed, Sat
Reported
1-5 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Timing of specimen collection: Pre-dose (trough) draw - At steady state concentration. 
Collect
Plain red. Also acceptable: Lavender (K2 or K3EDTA) or pink (K2EDTA). 
Specimen Preparation
Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL) 
Storage/Transport Temperature
Refrigerated. 
Unacceptable Conditions
Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution). 
Remarks
 
Stability
After separation from cells: Ambient: 5 days; Refrigerated: 2 weeks; Frozen: 2 months 
Reference Interval
40-100 µg/mL
Toxic: > 150 µg/mL
Interpretive Data
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.

Note
CPT Code(s)
80168
Components
Component Test Code*Component Chart NameLOINC
0090415Ethosuximide3616-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Emeside
  • Zarontin