Over the counter pain killers, like ibuprofen and others, can cause false positives in marijuana tests. The drug testing companies know this. That's why most companies allow for a second test to be done if you test positive and contest it. In the case of marijuana, it stays in your system longer than the pain killers if you're a regular pot user. So, they time the retest for when the pain killers have cleared and if you're using marijuana, it's still detectable in the second test.
Pain killers can make you fail pee test what now?
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Over the counter pain killers, like ibuprofen and others, can cause false positives in marijuana tests. The drug testing companies know this. That's why most companies allow for a second test to be done if you test positive and contest it. In the case of marijuana, it stays in your system longer than the pain killers if you're a regular pot user. So, they time the retest for when the pain killers have cleared and if you're using marijuana, it's still detectable in the second test.