I am not a regular powder user, however for the 1st time I made a bad choice and had a night out doing powder with friends on November the 28. I received a call saying I have a hair follicle drug test scheduled for the 30th of December. Once again, I have never used prior to that night. Can anyone tell me if I will pass?

Really depends whet they are testing for..

They said that cocain is one they test for.

Why would the be testing for cocaine if you've never had a problem with cocaine?

What do you stand to lose if you fail?

Its for a job interview. Cocaine is just one of the substance they test for.

It is very likely that it will show up.
But all you can do is try. Also, how much you used, how strong it was, and what is the cut off point for pass/fail on the test

A hair drug test is meant to show consistent use over time. A 1.5 inch sample of hair, cut at the scalp line, will go back 90 days. One time use usually won't show up. I would say you should be negative.

I do agree with mydogfifi, but I also have to say that I'm really not buying that the OP only used cocaine once. That's a hardcore drug, not something you just try on a whim. You normally lead up to it with other drugs first. So it may have been his first time using coke, but I'd bet money that he's been using other drugs for a lot longer, and more frequently.