Drug Testing FAQs
Can medicines or everyday substances affect a home drug test?
Yes. Some medicines, supplements and foods can affect a home drug test. They may contain a substance the kit detects or cause a false positive by reacting with the test. The effect depends on the specific kit, its drug panel and detection thresholds.
Can prescription medication affect a drug test?
A prescribed medicine can produce a genuine positive result. For example, codeine can register on an opiates screen because the body converts some of it to morphine.
That is not automatically a false positive or evidence of misuse. A screening result alone cannot show that someone has taken a medicine incorrectly.
Which everyday substances can affect results?
Certain medicines can cross-react with some screening tests, producing a false positive. An interference reported for one brand does not mean every home drug test behaves the same way.
Foods containing poppy seeds can affect some urine opiates tests. The amount consumed and the test’s cut-off matter; this is not a blanket explanation for a positive result.
What should you do before and after testing?
Check the kit’s interference information and tell the testing professional about medicines and supplements you take. Do not stop or change prescribed medication to influence a test.
Ask a pharmacist or clinician about an unexpected result. Arrange laboratory confirmation of a non-negative screen before making important decisions. Repeating a home test does not provide laboratory confirmation.
Taking medication?
Check the kit before you test.
Compare the drugs covered by Rezure’s urine and saliva screening kits. If you take medication, check possible effects with a pharmacist or clinician before testing.
Need help finding a kit’s instructions or product details? Contact our team before you order.
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