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Opiates are one of a general group of related organic molecules, many of which can actively be processed into specific opiates with the right knowledge. Opiate tests actually look for digestive products of opiates, not the drugs themselves. Many of the related molecules can cause the same reactions as these byproducts when tested, leading to a false positive for opiates. The best example is poppy seeds; these contain large enough amounts that consuming a sixpack of poppy seed bagels or a poppy seed loaf can cause a buildup which leads to a false positive (as demonstrated on Mythbusters and backed up by records of people being fired for false positives made after eating some poppy seed bakery goods for breakfast/lunch).

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16y ago

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