i am prescribed methadone for pain and went to the dentist because i had such a bad tooth ache & he prescribed norco. at the pain clinic i attend i did make them aware of the norco rx. long story short i tested positive for morphine and codeine which i DID NOT TAKE! are either of the same ingredients in norco or methadone or combined that could have given me a false positive. please it's driving me crazy trying to figure out why they came up and the norco didn't?