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) (-) Muscle Relaxants (2) Therapeutics (5) Test Sub-Category Other (2) Test Test Name 2720SP Metaxalone, Serum/Plasma 2720U Metaxalone, Urine