What does caraway seeds show up as on a drug urine screen?

Answer 1

Caraway oil is mainly carvone and limonene, neither of which would "show up on a drug screen" as anything. Perhaps you're thinking of poppy seeds, which contain sufficient opiates to show up as opiates on a very sensitive test (though if you've consumed enough poppy seeds to show up on a modern opiate screening panel, you've almost certainly been consuming them specifically forthe opiates; you're not going to test positive because you had one bagel).

Answer 2

They don't. You're thinking about poppy seeds, which used to show up as opiates because they come from opium poppies. Enough people were able to lie their way out of a failed opiates test by claiming they had eaten poppy seed bagels that morning, that the government finally bought a lot of poppy seed bagels and experimented until they had a cutoff that will forever prevent anyone from claiming bagels were the cause of their test failure.