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do poppy seeds give a positive marijuana test

Research shows that morphine and codeine can sometimes be detected in the urine up to 48 hours after ingestion of poppy seeds from some pastries, such as bagels, muffins, and cakes (see reference one for a free article on this topic).

Thevis M, Opfermann G, Schänzer W. Urinary Concentrations of Morphine and Codeine After Consumption of Poppy Seeds. J Anal Toxicol (January-February 2003) 27(1): 53-56 . URL: http://www.ncbi.nlm.nih.gov/pubmed?term=morphine%20and%20codeine%20on%20poppy%20seeds%20thevis

Can the morphine from poppy seeds be detected in a sample?

Lachenmeier DW, Sproll C, Musshoff F. Poppy seed foods and opiate drug testing—where are we today? Ther Drug Monitor. 2010 Feb; 32(1): 11-18.

The opium is composed of roughly 12 percent morphine, which is a narcotic that is prohibited in-competition. According to the World Anti-Doping Agency (WADA) Prohibited List, morphine is a threshold substance, meaning that WADA-accredited laboratories determine if a sample is positive for morphine when the level of morphine in the urine is greater than *1.3 micrograms/mL.

While poppy seeds don’t actually contain morphine, the seeds can become coated by, or absorb, opium extract during harvesting. Opium is the milky substance that is extracted along with the poppy seeds from the seed pod of the opium poppy after all the petals have fallen off.

American Addiction Centers: “What’s An Amphetamine? Addiction: Signs, Symptoms, and Treatment.”

U.S. National Library of Medicine: “Drug Testing,” “Quinine,” “Diphenhydramine,” “Dextromethorphan,” “Efavirenz,” “Amphetamine,” “Sertraline.”

Antidepressants

Massachusetts Medical Society: “Urine Abstinence Testing And Incidental Alcohol Exposure.”

Quest Diagnostics Employer Solutions Blog: “Cannabidiol and drug tests.”

If you hang out often with someone who puffs on pot, your urine could have traces of THC. That’s the chemical in the cannabis plant that gets you high. But chances are very low that you’ll have enough THC to trigger the positive result in the screens used by the federal government and many private employers. That’s most likely to happen right after you’re exposed to the smoke. A second test would need to confirm it.

In an article published in the October 2015 Society of Forensic Toxicologists (SOFT) Special Issue of the Journal of Analytical Toxicology, scientists from Quest Diagnostics compared the impact of the consumption of raw poppy seeds and a poppy containing food product on urine and oral fluid drug tests. For individuals performing safety-sensitive duties as well as other workers subject to routine drug testing for opiates, it is important to distinguish between dietary poppy seed ingestion and non-prescribed opiate or heroin abuse.

“The research tells us that it is possible to test positive on a drug test for morphine – even less so for codeine – after eating poppy seed-containing products. A unique characteristic of this study is that it compared the consumption of approximately the same amount of poppy seeds in both a prepared food item and as raw seeds and included the collection of both urine and oral fluid specimens. Unlike urine, the likelihood is much lower in oral fluid. Not surprisingly, most of the positive test findings and longest detection window resulted from ingestion of the large quantity of raw poppy seeds in a very short period of time prior to specimen collection. In fact, many of the study participants found such an amount of raw seeds to be extremely unpalatable. The results from this study suggest that there is less of a ‘poppy seed defense’ from a donor who completes an oral fluid drug test after casual dietary poppy seed consumption rather than a urine test because of the shorter detection window of oral fluid,” said Dr. Kimberly Samano.

Poppy seeds & drug tests

We know poppy seeds contain opiates – specifically morphine and codeine. Ultimately, what employers want to understand from drug testing experts is: Can eating poppy seeds produce a positive drug test for a job applicant or employee?

Download the full article from the Journal of Analytical Toxicology.

The “poppy seed defense” or the claim that ingesting poppy seeds is the reason for a failed drug test has long been used to challenge drug test results. A Seinfeld episode brought it into the mainstream with a story line where Elaine Benes tests positive for opium on her company’s urine drug test and blames the result on her favorite breakfast, a poppy seed muffin.