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Test Code 3505 Methsuximide (Celontin) as Desmethylmethsuximide

Additional Codes

Mayo Test ID

Reporting Name

Methsuximide (Celontin)

Performing Laboratory

Medtox Laboratories, Inc.

Specimen Type


Specimen Required

Submit only 1 of the following specimens:



Draw blood in a green-top (sodium heparin) tube(s), plasma gel tube is not acceptable. Spin down and send 2 mL sodium heparin plasma refrigerated in a plastic vial.



Draw blood in a plain red-top tube(s), serum gel tube is not acceptable. Spin down and send 2 mL of serum refrigerated in a plastic vial.

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time
Varies Refrigerated (preferred) 7 days
  Frozen  180 days
  Ambient  72 hours

Reference Values

10.0 - 40.0 ug/mL


Methsuximide measured as desmethylmethsuximide.


Day(s) and Time(s) Performed

Monday through Sunday

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FMETX Methsuximide (Celontin) 3801-8


Result ID Test Result Name Result LOINC Value
Z1107 Methsuximide 3801-8

Method Name

Gas Chromatography/Flame Ionization Detection (GC-FID)

Barnes-Jewish Hospital Additional Information:
For BJH Laboratory Use Only

Laboratory Processing Instructions:
BJH Chemistry will send test to Mayo Medical Laboratories who will forward to the performing laboratory. Do not reject specimen if not received on ice.