 [ Symptoms ] is there any way cannibas can show up in a urinalysis other than ingestion  my mother in law is 85 so it is doubtful that she took up smoking without our knowledge [ Disease ] has her prescribed any prescription medications that may contain cannabis why were they drug testing your elderly mother anyway these tests have to be order for a reason cannabis does not just show up on a routine urinalysis sounds like this young lady got a willie nelson contacthigh just kidding <positive_smiley> it could of been ingested or cannibis oils can enter through skin i however agree with beth83 its probably a fluke or accident