Cannabidiol ( CBD ) should not show up in a drug test. However, many CBD products contain traces of delta-9-tetrahydrocannabinol (THC), the main active ingredient in marijuana. If there is enough THC, it will show up in a drug test. This means that, on rare occasions, CBD use can result in a positive drug test.
CBD is not detected by drug tests because it does not cause intoxicating effects and is not an illegal controlled substance. However, people who use CBD can fail a drug test. Products containing CBD may be contaminated with THC or have incorrect labelling. Very small amounts of THC present in the material from which CBD is extracted can enter CBD oil in high enough quantities to give a positive result in a drug test.
This scenario may be more likely to occur when CBD oil is purchased from cannabis dispensaries in places where cannabis is legal, rather than from an online retailer. In most cases, CBD oil is very unlikely to show up in a drug test. Most employment drug tests specifically look for the presence of THC or THC metabolites. Most employers abide by the guidelines set by the Substance Abuse and Mental Health Services (SAMHSA), which include screening for THC but not CBD.
In addition, Spindle points out that "it does not take a large exposure to THC for some people to test positive". Most workplace drug tests are designed to detect THC and other illegal drugs, so the odds of taking CBD products and passing a drug test are in your favour. Even CBD suppliers themselves, who are aware of the responsibility they take on when making claims, have come out to say that pure CBD isolate and broad-spectrum CBD products have no risk of testing positive in a drug test. In theory, getting a false positive drug test from CBD oil should be relatively impossible from pure CBD oil containing less of.
No positive urine drug test results were observed in the other testing sessions (pure CBD capsules, pure CBD vape or placebo). News reports are emerging across the country implicating famous sports players, corporate employees and others who have tested positive for THC - the psychoactive component of marijuana - despite the fact that CBD oil is said to contain no THC. These results suggest that pure CBD, consumed once by itself, will not cause a positive drug test result, says Vandrey. However, there have been cases where CBD oil users have failed a drug test due to positive THC results.
Some sources report that, in rare cases, false test results have come from CBD oil breaking down into very small amounts of THC in the stomach. One study showed that certain laboratory tests can produce identical positive results for THC and CBD.