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 Alcohols (3) Alpha-2 Adrenergic Agonists (4) Alpha-2 Adrenergic Antagonists (2) Alpha Blockers (6) Beta Blockers (18) Calcium Channel Blockers (8) Diuretics (11) Drug Facilitated Sexual Assault (2) Other (28) Thiazides (2) (-) Vasodilators (1) Test Test Name 2308SP Hydralazine, Serum/Plasma