cbd drug test calendar

Drug Test Results: CBD Flower

After smoking 4 grams of CBD flower in four hours (that’s a lot), participants were drug tested using blood samples, saliva samples, and urine samples. None of the study participants failed their drug test.  While this is a very well done study, there are some important nuances that could affect you. Let’s look take a deeper look at the results.

  • learn exactly what happens when chronic hemp smokers get drug tested
  • learn what to expect from oral fluid tests, blood tests, and urine test results
  • find out results from different types of drug tests

If you don’t find an answer in this guide to a question you have, leave us a comment below. We’ll search the published studies to see if an answer exists and get back to you.

Let’s get started.


2019 Study: After smoking 4 grams of hemp in four hours, saliva, blood, and urine drug tests were all negative. #cbd tell a friend


nih cannabidiol study

Published April 8, 2019








After smoking 4 (one-gram joints of hemp containing 0.16% THC) within four hours, individuals were drug tested with three types of highly sensitive drug tests:

  • saliva
  • blood
  • urine


Drug Test Results


  • None of the drug tests returned a positive result.
  • In fact, none of the test results exceeded 1/5 of the minimum level of THC required to cause a positive drug test result. (1)









This research was conducted on “light cannabis.”

  • Light cannabis does not exceed 0.2 THC content but CBD content is higher and varies.
  • Light cannabis is a similar product to high CBD hemp strains grown in the U.S.
  • The cannabis cigarettes tested had a THC level of 0.16% THC and 5.8% CBD content. (2)


drug test studycannabidiol hemp test






Testing Methods


12 people were drug tested via:

  • saliva
  • blood
  • urine

6 were tested after smoking one cannabis cigarette and 6 were tested after smoking 4 cannabis cigarettes within a 4 hour period. (3)

Sample collections began a half-hour after the last cannabis joint was smoked.


Blood Drug Test Results


The highest THC readings were found in the blood samples but these readings were well below the minimum threshold for a positive result on the drug test. (4)


drug test studycbd drug test



Urine Drug Test Results


Urine concentrations of THC peaked 8 hours after the last light cannabis joint was smoked.  Again, the THC levels were significantly lower than the minimum threshold for a positive drug test result. (5)


Saliva Drug Test Results


The researchers concluded that the oral fluid method of testing had similar results to the blood test method and maybe a reliable method of testing THC/CBD. (6)


hemp drug test



Download The CBD Research


Video: Hemp Drug Test Results




Keywords: blood; light cannabis; oral fluid; urine; variable cannabidiol (CBD); Δ9-tetrahydrocannabinol (THC)

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