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) (3) Sample Type (-) Blood (2) Serum or Plasma (2) (-) Urine (1) Test Area Therapeutics (3) Test Category Analgesics (4) Antacids (2) Antianxiety (2) Antidepressants (2) Antiepileptics/Antiseizures (5) Antigout Agents (1) Antihistamines (4) (-) Antihypertensives (3) Antimicrobials (2) Antipsychotics (2) Benzodiazepines (2) Diuretics (2) Immunosuppressants (1) Muscle Relaxants (3) Other (3) Psychoactives (4) Sedative/Hypnotics (5) Stimulants (6) Volatiles (1) Test Sub-Category Alpha-2 Adrenergic Agonists (2) Diuretics (1) Test Test Name 1250B Chlorthalidone, Blood 1275B Clonidine, Blood 1275U Clonidine, Urine