Tramadol urine test in horses. Laboratory Testing question: What would cause a urine drug test to show positive results . . TIP Approved SOP OSU ANALYTICAL TOXICOLOGY LABORATORY Effective Date: 02/25/03 Supersedes: DRAFT Page: 1 of 22 IDENTIFICATION OF TRAMADOL AND NEFOPAM IN HORSE URINE BY GAS . . . Drug Detection Time Urine . . , diazepam in my case) or Tramadol? If a test is . . . . . e. do not affect the results of the test of hair as much as smoke of the champion horse . A traditional uri... more