CPT: 80369
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Test Details


  • Rela®
  • Sodol®
  • Soma® Compound
  • Soprodol®
  • Soridol®

Test Includes

Carisoprodol; meprobamate (carisoprodol metabolite)


Evaluate toxicity; monitor therapeutic levels


This test was developed, and its performance characteristics determined, by LabCorp. It has not been cleared or approved by the US Food and Drug Administration (FDA).


Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Reference Interval

Therapeutic: meprobamate: 6−12 μg/mL

Specimen Requirements


Serum or plasma


2 mL

Minimum Volume

0.6 mL


Red-top tube, lavender-top (EDTA) tube, or green-top (heparin) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.


Transfer separated serum or plasma to a plastic transport tube.

Storage Instructions

Room temperature

Stability Requirements



Room temperature

14 days


14 days


14 days

Causes for Rejection

Gel-barrier tube

Clinical Information


Tietz NW. Clinical Guide to Laboratory Tests. Philadelphia, Pa: WB Saunders Co;1990:722-723.


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
716274 Carisoprodol (Soma), Serum 716275 Carisoprodol, Serum ug/mL 3437-1
716274 Carisoprodol (Soma), Serum 716276 Meprobamate, Serum ug/mL 3753-1
Reflex Table for Carisoprodol, Serum
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 700475 Disclaimer: 700475 Disclaimer: N/A
Reflex Table for Meprobamate, Serum
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 700476 Disclaimer: 700476 Disclaimer: N/A

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