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) (2) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type (-) Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area Therapeutics (2) Test Category Acids (2) Alcohols (2) Analgesics (1) Anesthetics (2) Antidepressants (4) Antiepileptics/Antiseizures (2) Antihypertensives (2) Antimicrobials (1) Antipsychotics (4) (-) Cholinesterase Inhibitors (2) Depressants (1) Sedative/Hypnotics (1) Solvents (3) Terpenes (1) Volatiles (4) Test Sub-Category Other (2) Test Test Name 4038B Pyridostigmine, Blood 4038U Pyridostigmine, Urine