A 52-year-old male asked:
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i took zanaflex and cipro (ciprofloxacin) at the same time last night and the urine drug screen came back as a positive for amphetamine why is that?

1 doctor answer
Dr. Robert Fietsam
34 years experience Thoracic Surgery
False positive 20%: Cipro (ciprofloxacin) can cause positive UDS for amphetamines. False positives can occur > 20 % for many normal meds, like antibiotics.
Answered on Jun 26, 2017
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