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) (1) Sample Type Blood (2) Serum or Plasma (2) Umbilical Cord (1) (-) Urine (1) Test Area Therapeutics (1) Test Category Analgesics (2) Antacids (1) Antianxiety (1) Antidepressants (3) Antiepileptics/Antiseizures (2) Antihistamines (3) (-) Antihypertensives (1) Antimicrobials (1) Antipsychotics (3) Benzodiazepines (1) Biomarkers (1) Drugs of Abuse, Therapeutics (1) Metals/Elements (7) Muscle Relaxants (2) Other (1) Psychoactives (2) Sedative/Hypnotics (5) Solvents (2) Stimulants (4) Volatiles (2) Test Sub-Category Alpha-2 Adrenergic Agonists (1) Test Test Name 1275U Clonidine, Urine