Does CBD Oil Show Up on a Drug Test?

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Close up of CBD oil in test tubes at laboratory.

CBD has taken off as a natural remedy for a variety of ailments. CBD products like CBD oil can be made from either the hemp plant or the cannabis plant, which are closely related varieties of the same cannabis species, Cannabis sativa. CBD products contain a cannabinoid—a chemical—called cannabidiol, which does not make you high. The substance in marijuana that causes a buzz is a different cannabinoid, called THC, or tetrahydrocannabinol.

CBD products can still be problematic, however, when it comes to drug testing. Though drug tests screen for THC, not CBD, many CBD products contain a trace amount of THC which will be detected in your bloodstream during a drug test.

Factors in CBD Oil Showing on Drug Screen

Topical products that claim to contain CBD—like shampoos, cosmetics or creams—should not cause any reaction during a drug test because they do not enter the bloodstream. In the case of CBD oils, gummies, teas or transdermal patches, the situation is more complicated. In a test of 84 CBD products obtained online, 18 contained THC.

THC can be detected in a urine test for up to 15 days, depending on how often and how much you use. It leaves the bloodstream in about five hours, but substances your body makes from THC (THC metabolites) can show up for as long as 7 days. CBD tends to stay in the bloodstream from 2 to 5 days, depending on dosage and frequency. If you have been using CBD for a while, it can stay in your body for up to 30 days or more.

Taking CBD If You Undergo Drug Tests

If you are concerned that THC in your CBD oil or other CBD product may show up on a drug test, you may be able to reduce the chance of that occurring, though there is no guarantee. Some of the factors that may increase the likelihood of a failed drug test are:

  • Cross contamination with THC: This can occur if manufacturers make products with THC as well as CBD. CBD oil can also be contaminated by THC in a shop or at home.
  • Source: ‘Full spectrum CBD’ means that the product is derived from the whole plant and is more likely to contain THC. ‘CBD isolate’ means that the product is derived from hemp only and should not contain any other cannabidiols, such as THC. Look for products that have been tested by an independent lab. You may have to contact the company to find out about test results.
  • Dosage and Duration: Remember that the more CBD you take and the more often you take it, the longer you may have traces of THC in your system. It can take hours, days, or weeks for it to leave your body.

The legality of CBD products can be confusing. CBD products made from certain cannabis plant varieties are legal only in states where marijuana is legal, due to the potential THC content. CBD products made from hemp variety plants are legal throughout the United States as long as they contain less than 0.3% of THC and do not make any medical claims. (A hemp plant is defined as Cannabis sativa that contains less than 0.3% THC.)

CBD will not show up in a drug test because drug tests are not screening for it. CBD products may well contain THC, however, so you can fail a drug test after taking CBD products. If you take CBD oil, you should plan accordingly if your work or activities require you to undergo drug testing.

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Medical Reviewer: William C. Lloyd III, MD, FACS
Last Review Date: 2020 Sep 26
  1. Detection Times of Drugs of Abuse in Blood, Urine, and Oral Fluid. Therapeutic Drug Monitoring https://journals.lww.com/drug-monitoring/Abstract/2004/04000/Detection_Times_of_Drugs_of_Abuse_in_Blood,_Urine,.20.aspx
  2. How to Make Sure Your CBD is Legal and of High Quality. High Times. https://hightimes.com/sponsored/cbd-oil-legal-high-quality/
  3. CBD Toxicity Study Guiding FDA Regulation to Kick Off this July. High Times. https://hightimes.com/news/cbd-toxicity-study-guiding-fda-regulation-kick-off-july/
  4. I Take CBD Oil. Will I Pass a Drug Test? High Times.https://hightimes.com/sponsored/i-take-cbd-oil-will-i-pass-a-drug-test/
  5. Cannabidiol. MedlinePlus, U.S. National Library of Medicine. https://medlineplus.gov/druginfo/natural/1439.html
  6. CBD in Food and Dietary Supplements: What is the legal status? The Continuum of Risk. https://www.thecontinuumofrisk.com/2020/04/cbd-in-food-and-dietary-supplements-what-is-the-legal-status/
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