What over the counter medecine can make u be positive on a urine test?

Answer 1

Certain over-the-counter medications, such as pseudoephedrine (found in cold medications), can lead to false positives on urine drug tests for methamphetamine. Other medications, like diphenhydramine (an antihistamine), may also interfere with results, potentially causing false positives for substances like PCP. It's important to inform the testing facility about any medications you are taking to avoid misinterpretation of results.