Poppy Seed Marijuana

You scoff a few poppy seed bagels and then take a routine workplace drug test later in the afternoon. Poppy Seeds and Drug Tests The urban legend that eating poppy seeds can lead to a failed drug test is, in fact, not a legend. Eating poppy seeds – even as few as are typically contained in a

Mythbusters: Poppy Seeds

Y ou scoff a few poppy seed bagels and then take a routine workplace drug test later in the afternoon. The result comes back positive for opiates, and you realise your choice of lunch has put you under suspicion of having a heroin habit. Sounds far-fetched? Mythbusters investigates the surprisingly potent poppy seed effect.

It might seem unlikely that eating a few slices of poppy seed cake or a couple of bagels with a poppy seed topping could be enough to make a non-drug user get red flagged in a drug test. But in fact it’s well documented that eating poppy seeds, which are commonly used in muffins, bread and bagels, can be enough to trigger a positive reading for the opiate morphine.

It’s not an urban myth; it’s a scientific fact. On its website, the government-owned Institute of Environmental Science and Research (ESR) confirms that morphine can be present in a urine sample when poppy seeds have been consumed, but it says they would usually have to be eaten within 12 to 24 hours of the sample being collected.

Because poppy seeds come from the seed pods of opium plants, they can be contaminated with opium milk, which contains morphine. Before they’re used as an ingredient in baking, the seeds are cleaned and processed but are still likely to contain traces of opiate residue. It’s not a high enough concentration for someone to feel any morphine-like effects, but it can be enough to cause a positive result on a sensitive test.

Workplace drug testing is becoming commonplace, particularly for people who operate heavy machinery such as large diggers or work in professions where their performance has a bearing on public safety, such as airline pilots or bus drivers.

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Someone who eats a bagel or bread containing poppy seeds in the morning and is tested later in the day will have lower levels of morphine in their urine than someone who is abusing opiate drugs. To prevent ‘false’ positive screening results caused by poppy seed ingestion the United States Federal Government has raised the workplace testing threshold for opiates from 0.3 micrograms per millilitre to 2 micrograms per millilitre, and the US military has even higher levels. But in New Zealand and Australia, the current workplace testing standard is still set at the 0.3 microgram level.

With this threshold, someone who eats a couple of poppy seed muffins in the morning would probably test positive a few hours later. Toxicologist Grant Moore, who works for Canterbury Health Laboratories (CHL), which carries out workplace drug tests for organisations around the country, says an internal project he was involved with showed even eating one slice of a poppy seed cake (which contained three-quarters of a cup of poppy seeds) could cause a positive urine test result for opiates. Other food sources such as poppy seed crackers and poppy seed bread led to similar results.

There are reports of cases internationally where workers have lost their jobs after failing a workplace drug test because of their penchant for poppy seed cakes or bagels. In 1990, an American Police officer from St Louis was suspended after a random drug test came back positive for opiate use. He had eaten four poppy seed bagels the day before. He successfully argued the result was caused by diet, not drugs, and was later reinstated. Moore can’t imagine that scenario happening here and says the lower threshold hasn’t been a real problem.

“Cases of false positives caused by poppy seed ingestion shouldn’t happen if full testing is carried out properly.”

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Before they provide a urine sample for testing, people are asked to fill out a form that asks whether they have eaten poppy seeds or taken any medication such as Panadeine, which is codeine based. Because of the known effect of poppy seeds on morphine levels, a note will be made on a test report that a positive result could be linked to dietary exposure. If this happens, further confirmation testing is carried out to help distinguish between illicit heroin use and innocent poppy seed consumption. This is done by testing for the presence of a unique heroin metabolite called monoacetylmorphine (MAM).

“If you do have a workplace screen and it is not negative, it must go on for further confirmation,” Moore says.

Mythbusters’ advice to poppy seed fans is clear – it’s safest to avoid eating them before taking a drug test if you want to keep things simple.

Poppy Seeds and Drug Tests

The urban legend that eating poppy seeds can lead to a failed drug test is, in fact, not a legend. Eating poppy seeds – even as few as are typically contained in a large Costco poppy seed muffin – can yield positive test results for both morphine and codeine when testing standards are not adjusted to weed out such “false” positives.

Poppy seeds, morphine, and codeine all naturally occur in the opium poppy plant, Papaver somniferum. Accordingly, poppy seeds like those used in muffins, bagels, breads, and pastries, contain the opiates codeine and morphine. The opiate content of poppy seeds varies greatly based on the seed origin, when the seeds are harvested, and how the seeds are processed from harvest to consumer. Opiate concentration is also affected by how seeds are ultimately consumed: raw, ground into a paste, sprinkled atop a bagel, baked whole into a cake or muffin, etc.

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Multiple published, peer-reviewed, scientific studies have shown that ingestion of poppy seeds can result in urinary concentrations of morphine and codeine detectable in standard drug tests used by certain workplaces. Though many workplace drug tests have adjusted their laboratory standards to avoid “false” positive results caused by ordinary poppy seed consumption, it is still possible to test positive for illicit opioid drugs when lower cutoffs are used.

In 1998, the Federal Department of Health and Human Services Substance Abuse and Mental Health Services Administration revised their mandatory guidelines for federal workplace drug testing programs due to concerns that many positive opiate tests were the result of poppy seed consumption. While the previous urine sample testing cutoff levels for both morphine and codeine previously were 300 ng/mL (nanograms per milliliter), the Department of Health and Human Services increased the cutoff levels for both opiates to 2,000 ng/mL, effective May 1, 1998.

If you know you will be required to provide a urine or other biological sample for drug testing, it is prudent avoid consuming poppy seeds for at least one day prior to giving the sample.

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