Anyone else had false drug test results?

My partner just tested positive for ketamine, but she's never touched the stuff. Now they're taking away all her meds and it's stressing us out. Has anyone else had this happen? I don't get how a test can be so wrong. Would love to hear if anyone's been through something similar or knows what to do next. #DrugTesting #FalsePositive #NeedAdvice #Health #MentalHealth