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could phentermine give you a false positive on a urine drug screening ?

3 doctor answers
Dr. Christopher Quinn
16 years experience Emergency Medicine
Maybe: It is possible on some drug screens for Phentermine to show up as amphetamine. I usually warn my weight loss patients of this and write them a letter for their employer. Your doctor should be able to write you a letter in case this happens.
Answered on Mar 5, 2016
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Dr. Stuart Wasser
34 years experience Addiction Medicine
although phentermine may give an initial false positive on a screening, a confirmation by GCMS will clarify the situation. This should be done automatically
Jan 5, 2012
Dr. Alan Wartenberg
48 years experience Addiction Medicine
Yes: It can cause a false positive amphetamine, but confirmatory tests, which should always be done when testing is for forensic purposes (probation/parole, job-related, social services). However, many people doing drug testing are not trained in it, and often think that results of a screening test are definitive. You have the right to demand confirmatory testing with gc/ms or other means.
Answered on Sep 7, 2017
Dr. Paul Pyles
32 years experience Addiction Medicine
Yes: Can give false positive for amphetamines.
Answered on Aug 5, 2016

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