Will azo pills give false positives?

Yes, Azo pills, which contain phenazopyridine, can cause false positives in certain urine drug tests, specifically for substances like benzodiazepines or other medications. This occurs because the dye in Azo can interfere with the test's chemical reactions. If you're undergoing drug testing, it's important to inform the testing facility about any medications you are taking, including Azo.