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) (5) Sample Type Blood (2) Fluid (1) (-) Serum or Plasma (2) Tissue (1) Urine (2) Test Area Exposure (1) Therapeutics (1) Test Category Acids (1) (-) Alcohols (1) Anesthetics (2) Antidepressants (3) Antiepileptics/Antiseizures (1) Antihistamines (1) (-) Antihypertensives (1) Antimicrobials (1) Antiparkinsons (1) Antipsychotics (2) Cholinesterase Inhibitors (1) Depressants (1) Solvents (1) Terpenes (1) Volatiles (1) Test Sub-Category Calcium Channel Blockers (1) Other (1) Test Test Name 4003SP Propylene Glycol, Serum/Plasma 4770SP Verapamil, Serum/Plasma