Worked in BC with a an Advanced first-aider/safety officer whose sub-contracted company did drugs tests. When I refused to test any employee's, she took over the responsibility. I treated a pt with severe back pain with endocet (Medical directors orders). Hid personal Physician had previously prescribed endocet but he did not have his script with him. When I kept him off the balance of his day, she went to his room and drug tested. Of course, he was positive and she put in her report and he was fired immediately for drug abuse. A phone call from his lawyer got the facts straitened out, he got his job back and because she lost face, hounded him. and me.
I quit as soon as they could find a replacement as I am a medical professional not a drug cop.
Unfortunately in Canada, safety people are considered much more important than the medical staff and try to demand medical records from us.