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Laboratory Test Directory

Ethosuximide, Serum or Plasma (Updated)


Name Method Department Units
Ethosuximide, Serum or Plasma Quantitative Enzyme Immunoassay
Send Out ug/mL

Specimen Requirements

Serum Spun, Plasma Spun

Container Type Container Size Specimen Volume

Red tube, (no anticoagulant), No Gel

3 mL 1 mL

Purple tube (EDTA)

3 mL 1 mL

Room temperature - 5 day(s)
Frozen - 2 month(s)
Refrigerated - 1 week(s)

Specimen Preparation

  • Centrifuge within 2 hours, separate supernatant and freeze

Reasons for Rejection

  • Collected in tube with gel separator
  • Wrong collection tube
  • Whole blood received from off-site
  • Not centrifuged within time frame


Patient Prep: Timing of specimen collection: Pre-dose (trough) draw - At steady state concentration.

CPT Code

  • 80168