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I just did a drug test and I got a positive result for opiates. The test was repeated with the same outcome. The thing is, I have never taken any opiates. About six weeks ago, I was at a party where a lot of pot was being smoked but certainly not any opiates. I didn't smoke any pot.
9 Upon admission, the patientâs routine immunoassay for amphetamines showed a negative result, but after 3 days, a repeat analysis was positive for amphetamine. A confirmatory test was ordered and identified IV phenylephrine as a likely cause of the false positive.Another drug that has been associated with false positive results for amphetamine is 1,3 dimethylamylamine (DMAA). DMAA has sympathomimetic activity and is an ingredient in some dietary and weight-loss supplements. Upon admission, the patientâs routine immunoassay for amphetamines showed a negative result, but after 3 days, a repeat analysis was positive for amphetamine. A confirmatory test was ordered and identified IV phenylephrine as a likely cause of the false positive.