Will stacker 2 cause you to fail a drug test?

I just took a urine drug test today for pre employment screening and it came back positive for amphetamines. I was very surprised from the result because I do not use ANY illegal or prescription drugs. The only thing I could narrow it down to is stackers 2. So from this, regardless of everything that I've read, I am believing that by taking stackers 2 it could cause a false positive on a drug test. : (