What will make u test positive for opiates?

There are quite a few things,I recently found out that liver disease, kidney disease, & infection can cause a false positive.

Of all the things you listed, suboxone is the only one that won't test positive as an opiate because of the way they were designed not to, they only will test positive as bupenoprhine. They were designed this way so that subs doctors and clinics could check the progress of a patient to make sure they were not taking opiates, so therefore it can not test positive as an opiate.All the other things you listed will show up, and suboxone will too, if they check for buprenorphine. I am pretty sure methadone shows up as opiate, it has nothing to do with anything being synthetic. Drug tests can definitely be flawed whether they are a simple urine in a cup quickie or a mail to the lab test, but I am not sure other than the poppy seeds what would also show up false positive as opiate. There is a member named ChristineATU who knows of a link that gives a list of what meds or substances give false positives. It also depends on the sensitivity of some of the tests nowadays.