FAQ: Can secondhand marijuana smoke render a positive drug test?

Q:  Can secondhand marijuana smoke render a positive drug test?

• There are no published, peer-reviewed studies to date that indicate, even with today’s
  increased concentrations of THC in marijuana, that someone would test positive due to
  ‘passive’ or ‘incidental’ exposure at events such as parties or concerts.”
• The National Institute on Drug Abuse (NIDA) concurs, reporting that it unlikely that secondhand
  marijuana smoke could give someone a contact high after examining research that
  measured factors such as drug potency, hours of exposure, and room ventilation.
• PUBLISHED JOURNAL ARTICLES BY YEAR
  • 2017
  • Health effects of exposure to second- and third-hand marijuana smoke: a systematic review. (USA, full, 2017) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5741419/ 
  • Interpretation of cannabis findings in the hair of very young children: mission impossible. (France, abstract, 2017) https://www.eurekaselect.com/157855/article 
  • 2016
  • A systematic review of passive exposure to cannabis. (Switzerland, abstract, 2016) https://www.sciencedirect.com/science/article/abs/pii/S0379073816304935 
  • 2015
  • Non-smoker exposure to secondhand cannabis smoke. I. Urine screening and confirmation results. (USA, full, 2015) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4342697/ 
  • Non-smoker exposure to secondhand cannabis smoke II: Effect of room ventilation on the physiological, subjective, and behavioral/cognitive effects. (USA, full, 2015) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4747424/ 
  • Nonsmoker Exposure to Secondhand Cannabis Smoke. III. Oral Fluid and Blood Drug Concentrations and Corresponding Subjective Effects. (USA, full, 2015) https://academic.oup.com/jat/article/39/7/497/819441