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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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How Long It Will Take Fluoxetine To Be Undetectable In Blood Test?

Hello,
I was taking fluoxetine and am going to Korea where they will do a medical exam. They might test for fluoxetine and I am worried that it will show up on blood or urine tests. I have been off the drug for about a week, how long does it take for it to be undetectable in tests? Please help.
Tue, 2 Sep 2014
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Pathologist and Microbiologist 's  Response
Hi!
welcome to HCM!
Fluoxetine has relatively slow elimination half-life of 1 to 3 days after acute administration and 4 to 6 days after chronic administration and its active metabolite, norfluoxetine has elimination half-life of 4 to 16 days after acute and chronic administration, So it varies among individuals.safest is approx 30 days.
hope this helps!
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How Long It Will Take Fluoxetine To Be Undetectable In Blood Test?

Hi! welcome to HCM! Fluoxetine has relatively slow elimination half-life of 1 to 3 days after acute administration and 4 to 6 days after chronic administration and its active metabolite, norfluoxetine has elimination half-life of 4 to 16 days after acute and chronic administration, So it varies among individuals.safest is approx 30 days. hope this helps!