I love Poppy seeds... I have Marzetti dressing with them, occasionally!

They are well known false positive givers.

My understanding is that a second test is often given, when the first screen
fails. The first screening types are cheap and not extremely accurate.
So a second one which is more specific can weed out errors and false positives.

If the test was positive for marjuana...that substance stays in the body for months. And I have known people who tested positive on the first round,
due to passive inhalation alone.

But Lidoderms should not be showing up for any category, and that was the basic question.

Thanks Michael.