Ethosuximide




Test Mnemonic

ETHOS

CPT Codes

  • 80168 - QTY (1)

LOINC ®

3616-0

Aliases

  • Zarontin

Performing Laboratory

ARUP


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mLSerumNo additive (Red) RefrigeratedTiming of specimen collection: Pre-dose (trough) draw - At steady state concentration. Do not use serum separator tubes. Separate from cells ASAP or within 2 hours of collection and transfer into standard aliquot tube.

Alternate Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mLPlasmaEDTA (Lavender) RefrigeratedTiming of specimen collection: Pre-dose (trough) draw - At steady state concentration. Do not use plasma separator tubes. Separate from cells ASAP or within 2 hours of collection and transfer into standard aliquot tube.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
0.5 mL     

Stability

Environmental Condition Description
AmbientAfter separation from cells: 5 days
RefrigeratedAfter separation from cells: 1 week
FrozenAfter separation from cells: 2 months

Days Performed

Sun - Sat

Turnaround Time

2 - 6 days

Methodology

Name Description
Enzyme Immunoassay (EIA) 

Reference Range

Ethosuximide
Sex Age From Age To Type Range Range Unit
   Years99 YearsNormal40 - 100ug/mL
       Toxic: > 150 ug/mL 

Special Info

Timing of specimen collection: Pre-dose (trough) draw - At steady state concentration. Unacceptable conditions: Whole blood, gel separator tubes, citrate (light blue) tubes, SPS or ACD solution (yellow) tubes. This test is New York DOH approved.

Clinical Info

Used to optimize drug therapy and monitor patient adherence.