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Laboratory Medicine

Test catalogue

Ethosuximide (Zarontin, Anti-Epileptic, Anti-convulsant)

Test Name

Ethosuximide (Zarontin, Anti-Epileptic, Anti-convulsant)

Red Tube Specimen Type / Requirements

Container Type = 1 Red Top

Minimum Volume = 2 ml serum

Tube must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Collect sample in red top tube without gel separator. Submit trough specimen.Collected within 1 hour prior to next dose or at least 12 hours after last dose. Write your initials, date and time of collection on the collection label.

Laboratory Staff Instructions: Separate from cells within as soon as possible. Avoid gel-separator tubes. Submit two 1 mL aliquots. Store and send frozen

Rejection Criteria: Plasma, gel-separator, Gross hemolysis, Unlabeled or Not Sufficient Quantity Samples will be rejected.

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

5 Days

Test Utilization


Reference Value

Therapeutic: 280 - 710 µmol/L

Test Code




Testing Location

Referred Out – ON, Canada (ROICL02)

Other Information