Modern drug testing technology can detect a variety of substances, including medications like Advil, Aleve, Motrin, Zoloft, Prozac, and Tylenol, as well as foods containing poppy seeds, CBD, mouthwash, hand sanitizer, vitamin B supplements, and tonic water. False positive results can occur due to the presence of these substances in a person's system at the time of testing. To dispute a false positive drug test, one must first be transparent about any medications or substances they have consumed prior to the test, and then seek independent support from a specialist who can represent them through the process. Re-testing may also be an option, with many employers accommodating requests for re-tests if presented with evidence of an inaccurate result. Employers are not always required to keep job offers on hold while a false positive is disputed, and in some cases, they may rescind the offer as a result.