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 (1) Serum or Plasma (1) Test Area Therapeutics (2) Test Category Antiarrhythmics (2) Anticholinergics (3) Antiepileptics/Antiseizures (2) Antigout Agents (3) Antihistamines (14) (-) Antihypertensives (2) Antipsychotics (5) Cholinesterase Inhibitors (3) Diuretics (5) Immunosuppressants (1) Industrial/Environmental Toxins (1) Muscle Relaxants (7) Other (1) Sedative/Hypnotics (4) Test Sub-Category Alpha-2 Adrenergic Agonists (3) Alpha Blockers (2) Calcium Channel Blockers (3) (-) Diuretics (2) Test Test Name 1250B Chlorthalidone, Blood 1250SP Chlorthalidone, Serum/Plasma