There are things that are legal that can create false positives, especially if the testing place uses cheap tests or,outdated,ones.
Poppy seed bagels for one. Some supplements and herbs may cause false positives even though they are not illegal drugs, people may not be aware they do.
These tests are good for catching drug users, bad for false positives when they happen.
Wrong answer hockypuck. I was in the military and had a senior non-commissioned officer come up positive for opiates. I had a list of things that would come up positive and we found the answer. Saved his career.
If today’s employees have the will to overcome the desire to do more than make themselves “happy” they can get a well-paying job.
People don't willingly ditch a potential interview knowing they ate a poppy seed bagel.
“These tests are good for catching drug users, bad for false positives when they happen.”
All of the companies I’ve worked for in the last 20 years take two samples. The first is stored in case the second yields a positive. Then the first is retested with alternative methods. Believe me, the more expensive tests can’t be fooled.