Drug Testing Chronic Hemp Smokers

This is a scientific guide.

Based on the latest medical studies.

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

Let’s get started.

2019 CBD Research

Does smoking 4 grams of 0.16% THC hemp cause a failed drug test?

nih cannabidiol study

New CBD Study Published April 8, 2019

cbd study research results

By the numbers:  After smoking 4 (one-gram joints of hemp containing 0.16% THC) within four hours, individuals were drug tested 3 ways:

  • oral fluid test
  • blood test
  • urine 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)

cannabidiol research 2019

Our summary:  This research was conducted on “light cannabis” which is sold in Europe.

  • 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: 12 people were drug tested via:

  • oral fluid
  • blood test
  • urine test

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 cigarette was smoked.

Blood test results: Highest THC readings were found in the blood samples but these readings did not come close to exceeding the minimum threshold for a positive result on the drug test. (4)

drug test studycbd drug test

Urine test results: Urine concentrations of THC peaked 8 hours after the last light cannabis cigarette was smoked.  Again, the THC levels did not come close to reaching the minimum threshold for a positive drug test result. (5)

Oral Fluid 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

 

Check out this video about hemp drug test results.

 

Study Authors:

Pacifici R

National Centre on Addiction and Doping Istituto Superiore di Sanità

Pichini S

National Centre on Addiction and Doping Istituto Superiore di Sanità

Pellegrini M

National Centre on Addiction and Doping Istituto Superiore di Sanità

Rotolo MC

National Centre on Addiction and Doping Istituto Superiore di Sanità

Giorgetti R

Section of Legal Medicine, Università Politecnica delle Marche

Tagliabracci A 

Section of Legal Medicine, Università Politecnica delle Marche

Busardò FP

Section of Legal Medicine, Università Politecnica delle Marche

Huestis MA

Lambert Center for the Study of Medicinal Cannabis and Hemp, Institute of Emerging Health Professions, Thomas Jefferson University

 

 

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

References

Pacifici R, Pichini S, Pellegrini M, et al. THC and CBD concentrations in blood, oral fluid and urine following a single and repeated administration of “light cannabis” [published online ahead of print, 2019 Apr 8]. Clin Chem Lab Med. 2019;/j/cclm.ahead-of-print/cclm-2019-0119/cclm-2019-0119.xml. doi:10.1515/cclm-2019-0119

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