Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (2) (-) Serum or Plasma (2) Urine (2) Test Area Therapeutics (2) Test Category Antihypertensives (2) Test Sub-Category (-) Alpha-2 Adrenergic Agonists (2) Alpha-2 Adrenergic Antagonists (1) Alpha Blockers (3) Beta Blockers (9) Calcium Channel Blockers (4) Diuretics (6) Drug Facilitated Sexual Assault (1) Other (11) Thiazides (1) Vasodilators (1) Test Test Name 1275SP Clonidine, Serum/Plasma 2186SP Guanfacine, Serum/Plasma