the short answer to your question is "yes. " but that's not the end of the story. a 2010 study published in the american journal of health system pharmacy noted that several categories of medications were linked to various types of false-positive urine drug screen tests (including screens for methadone). among the specific medications that caused false-positives were antihistamines including diphenhydramine (better known as benadryl) and doxylamine -- both of which are ingredients in many over-the-counter cough-and-cold remedies. however these antihistamines were not specifically linked to false-positives for methadone in the study. it's worth noting that employers and others who perform routine drug screenings aren't required to give you a do-over. they can choose to accept the initial test results at face value. i wish you all the best with this.
can any otc cause positive test for methadone ie; nyquil nighttime cold medicine