I have recently taken a random drug screening from my urine sample. I tested positive for BZO. I only have/am taking Hydroxycut Max and Naproxen which I'm prescribed for. What can cause this?

Here is a list which will cause you to test positive. Are you saying that you ingested none of these?

List of benzodiazepines - Wikipedia, the free encyclopedia

EDIT: Naproxen is actually naproxen benzodiazepine.

I have heard typically naproxen will often give a false positive for BZO or THC. Mine came up positive for BZO and naproxen and Hydroxycut max are the only things I've taken.