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A member asked:
How long does phentermine take to absorb in the urinary system so it will show in a urine drug test?
A doctor has provided 1 answer
Five days: Phentermine adult half-life is variable between 7 to 20 hours. It takes approximately 6 half lives for a drug to be eliminated from your system. 20*6/24=5 days. The Phentermine will stay in your system for approximately 5 days.
Answered 4/14/2018
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