Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography (GC) (6) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (17) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (6) (-) Immunoassay (IA) (1) Sample Type Serum or Plasma (1) Test Area Therapeutics (1) Test Category Analgesics (21) Anesthetics (1) (-) Antiarrhythmics (1) Depressants (6) Drugs of Abuse (31) Drugs of Abuse, Therapeutics (16) Exposure (1) Hallucinogens (9) NPS/Designer Drugs (1) Other (1) Psychoactives (3) Sedative/Hypnotics (3) Stimulants (10) Therapeutics (17) Test Sub-Category Cardiac Glycosides (1) Test Test Name 1613SP Digitoxin, Serum/Plasma