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 Therapeutics (2) Test Category Drugs of Abuse (4) Drugs of Abuse, Therapeutics (3) (-) Muscle Relaxants (2) NPS/Designer Drugs (1) Therapeutics (3) Test Sub-Category Other (2) Test Test Name 2720B Metaxalone, Blood 2720U Metaxalone, Urine