Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type (-) Blood (1) (-) Serum or Plasma (1) Urine (1) Test Area Drugs of Abuse (4) Postmortem (7) (-) Therapeutics (2) Test Category Muscle Relaxants (2) Test Sub-Category Other (2) Test Test Name 2720B Metaxalone, Blood 2720SP Metaxalone, Serum/Plasma