I had been taking Norco for dental work that I

Patient: I had been taking Norco for dental work that I was having done. I had to take a hair follicle drug test for my place of employment and it came back positive for cocaine and I had never done cocaine. Is it possible that the Norco caused a false positive? The Norco didn’t show up on the test as an opiate, so I’m confused? My job is on the line…Thank you

Doctor: