Inadvertent exposure to marijuana (via secondhand smoke) is unlikely to be enough for a person to get a positive drug test result, but it is possible. Being in a room with heavy pot smokers for several hours may cause the inhalation of enough THC containing smoke to result in a positive test.
The conclusion is that it’s still theoretically possible for traces of THC metabolites to be present in the stomach acid in the instance where “less-purified CBD productions” are ingested.
CBD is one of many active chemical compounds in the cannabis plant. One reason it’s gaining momentum in popularity is because it is said to lack the component of the plant that causes a person to get high, which is called THC (tetrahydrocannabinol).
4. Secondhand Exposure to THC
Cannabis is the umbrella term describing hemp and marijuana plants—two different varieties of the cannabis genus. Both marijuana and hemp can be described as cannabis plants; however, it is important to note that they are still two separate plants.
For instance, if someone who had direct contact with marijuana then touched your hair, you could feasibly receive a false positive on a drug screening that tests your hair.
If you take CBD oil, there are measures you can take to try to prevent failing a drug test.
Arno Kroner, DAOM, LAc, is a board-certified acupuncturist, herbalist, and integrative medicine doctor practicing in Santa Monica, California.
CBD and CBN are two of many chemicals found in cannabis plants. They differ from THC, the source of the marijuana “high.” CBD is present in marijuana but more abundant in hemp — cannabis plants that have little THC. CBN, meanwhile, is a THC derivative.
On the positive side, he noted, immunoassays are only screening tests. They would be followed up by “confirmatory testing” that does distinguish THC from other compounds. But you could still have a problem if your cannabis product was contaminated with THC, Fitzgerald said.
The researchers tested each batch with two tests commonly used for THC screening. CBN reacted with one, while the other three compounds triggered no false-positives.
Legally, Kroner noted, CBD products should only be produced from hemp plants with no more than 0.3% THC. But there’s no way for consumers to know for sure what’s in the products they buy.
Researchers found that CBD, or cannabidiol, did not react with either of two commercially available tests used to screen for marijuana use. However, another cannabis compound — cannabinol (CBN) — did.