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) (1) Sample Type (-) Serum or Plasma (1) Test Area Therapeutics (1) Test Category Antihypertensives (1) Test Sub-Category Antiarrhythmics (2) Antiparasitics (1) Antivirals (2) Appetite Suppressants (1) Barbiturates (4) Biomarkers (1) Calcium Channel Blockers (1) Herbicides (1) Insecticides (3) Monoamine Oxidase Inhibitors (MAOI) (1) Non-Barbiturate Sedative Hypnotics (2) Opiates/Opioids (5) Organochlorides (2) Other (59) Phenothiazines (7) Sedative-Hypnotics (1) Selective Serotonin Reuptake Inhibitors (SSRI) (1) Small Molecule (1) Succinimide (1) Tetracyclics (2) Tricyclic (11) (-) Vasodilators (1) Test Test Name 2308SP Hydralazine, Serum/Plasma