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Phentermine FAQs

Will phentermine show as a positive result in a drug test?

Views: 22373 | 1386 out of 2816 people thought this was a useful answer

Answer

Yes, phentermine can produce a false-positive for amphetamines on a drug screen. This is because phentermine has a chemical structure similar to that of amphetamines.

Phentermine is usually detectable in urine for about 4-7 days after the last dose, but may be measurable in hair samples for much longer. It will also stay in the urine for longer if you were taking a very high dose or have been taking phentermine for a long time.

To read more about phentermine and drug tests, please click here.

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