Methsuximide and Normethsuximide : ARUP Lab Tests

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Methsuximide and Normethsuximide : 0090146

Mnemonic: METHSUX

Methodology:	Quantitative Gas Chromatography
Performed:	Mon, Thu
Reported:	1-5 days
Specimen Required:	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). Stability (collection to initiation of testing): After separation from cells: Ambient: 5 days; Refrigerated: 2 weeks; Frozen: 1 month

Reference Interval: Therapeutic Range: Methsuximide: < 1 µg/mL Normethsuximide: 10-40 µg/mL Total: 10-40 µg/mL Toxic - total: > 60 µg/mL
CPT Code(s):	83858 Methsuximide; 80299 Normethsuximide
Cross References:	Celontin (Methsuximide & Normethsuximide), Desmethylmethsuximide (Methsuximide & Normethsuximide), Methsuximide and Metabolite (Methsuximide & Normethsuximide), Normethsuximide (Methsuximide & Normethsuximide)

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