Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Colorimetry (C) (3) (-) Gas Chromatography (GC) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (3) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (15) Sample Type Serum or Plasma (1) Test Area Therapeutics (1) Test Category Alcohols (3) Analgesics (3) Anesthetics (8) Antidepressants (6) Antiepileptics/Antiseizures (8) (-) Antihypertensives (1) Antipsychotics (1) Biomarkers (1) Depressants (1) Hallucinogens (6) Herbicides (3) Pesticides/Insecticides (4) Sedative/Hypnotics (2) Solvents (15) Volatiles (12) Test Sub-Category Vasodilators (1) Test Test Name 2308SP Hydralazine, Serum/Plasma