Will the use of hydrocodone show positive for codeine on a hair folical drug screen?

No, it will show positive for hydrocodone. So yes it is still a violation. Just tell them you were in Mexico, and it is legal there.

Will the use of hydrocodone show positive for codeine on a hair folical drug screen?

you will show positive for an opiate.

Will the use of hydrocodone show positive for codeine on a hair folical drug screen?

No, I'm sorry to say hydrocodone is stronger than codeine. Hydro, or otherwise known as Vicodin will come up positive as an opiate. Leaving you with a vague result that people can interpret loosely. You could be using methadone, heroin, oxy's ect... Unless you go to a lab that can take the follicle and break down each drug and eliminate it one at a time, but that's a hell of a lot more expensive. You will come up positive, but for opiate use, it won't specify. Codeine and Vics also have Tylenol/aspirin which is really bad for your liver at the same time. Pain killer are a rough detox. Good Luck, but you r busted if you did the test already, if you didn't and it's a matter of life and death and a job, reply maybe i can help. Telling them u went to Mexico isn't going to help, depending on your situation they will request copies of transportation to/from Mexico, a Dr. visit receipt, cause if you only took them once in Mexico for a pain you had there, a normal person would not just go buy them. They would see a legit Dr. You follow....only experienced users/seller go straight down to buy.