Lizzie asked
I'm just wondering if I'm being tested for narcotics, will taking a diet pill or pills such as truFix and truVision cause any kind of problems such as a false positive? I would just like to be sure that nothing along those lines will happen before I start taking diet pills.
At a glance
- No specific diet pill product (with the possible exception of kratom) is known to cause false-positives for opioids on drug tests.
- Nevertheless, there are countless reports of supplements containing adulterated or misbranded ingredients, which could theoretically cause you to fail a drug test.
Answer
There have been very few studies looking at whether or not any dietary supplements can cause a false-positive test for narcotics, like opioids.
However, false-positives with urine-based drug tests are fairly common, so it stands to reason that some supplements may cause a false positive, especially if they are tainted with unmarked/unlabeled substances.
In addition, there are many documented drugs that are known to cause false positives for opioids.
We have written extensively on the subject of false-positives for drug tests, which can be found here: What Causes False-Positives On Urine Drug Tests? Below are some highlights from that article:
