Can dr's tell the difference between poppy seeds and heroin in urine test?

Yes, doctors can generally distinguish between poppy seeds and heroin in urine tests. Standard drug tests, like the immunoassay, may detect opiates but typically cannot differentiate between them. However, confirmatory tests, such as gas chromatography-mass spectrometry (GC-MS), can identify specific substances and their metabolites, allowing for clear differentiation between poppy seed ingestion and heroin use. Therefore, while initial tests may show positive results for opiates, further analysis can clarify the source.