CA
A 37-year-old member asked:
How long will it take for prozac (fluoxetine) to leave my system?
1 doctor answer • 1 doctor weighed in
Dr. Donald Hazlettanswered
Psychiatry 56 years experience
Quite a while: Prozac (fluoxetine) taken over a period of three or more months, then stopped, can show the presence of fluoxetine for five or more weeks. Prozac has both a right and left isomer (like looking at yourself in the mirror and raising your hand and watching your raised r hand appear to be your l hand). Breakdown of fluoxetine yields nor-fluoxetine which lasts 2 x as long in the body as fluoxetine.
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsAnswered >2 years ago
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Ireland
A 51-year-old male asked:
How long does it take for Prozac (fluoxetine) to leave your system completely after discontinued?
2 doctor answers • 5 doctors weighed in
Dr. Imad Khreimanswered
Psychiatry 41 years experience
Apprx. 20 days: Prozac (fluoxetine) is a long acting medicine , between the original compound and the active metabolite the half life is around 96 hrs , so it takes approximately five times that for the level to drop to negligible.
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
Canada
A 33-year-old female asked:
Took 5mg of Prozac (fluoxetine) for 6 days. How many days would it take to leave my system?
1 doctor answer • 1 doctor weighed in
Dr. Katherine Caldwellanswered
Internal Medicine 19 years experience
Less than a week: The usual starting dose for fluoxetine (Prozac) is 20 mg, so you were on a VERY low dose, so after 6 doses there is not very much med in your body. The time for 1/2 the medicine to be eliminated from the body in a healthy person is 3 days at most, so it would take about 6 days for the last dose to be completely eliminated. It may be gone sooner depending on how quickly your liver metabolizes it.
Created for people with ongoing healthcare needs but benefits everyone.
1.5k viewsAnswered >2 years ago
A 46-year-old member asked:
How long does Prozac (fluoxetine) stay in your system?
1 doctor answer • 3 doctors weighed in
Dr. Marc Zimmermannanswered
Psychiatry 24 years experience
More than 2 weeks: The half life of this medication is as long as three days. It will be out of your system in 15 days depending on individual factors related to the patient. Ask your prescriber.
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsReviewed >2 years ago
A 36-year-old member asked:
How long approximately does it take for Prozac (fluoxetine) to get out of your system totally?
1 doctor answer • 2 doctors weighed in
Dr. Alan Alianswered
Psychiatry 34 years experience
Prozac (fluoxetine): Has half-life of up to 72 hours, so that multiplied by 5 means that it can stay in your system for up to 2 weeks or so.
Created for people with ongoing healthcare needs but benefits everyone.
5.7k viewsReviewed >2 years ago
A 45-year-old member asked:
How long does it take for Prozac (fluoxetine) to become effective?
1 doctor answer • 8 doctors weighed in
Dr. Steven Reidbordanswered
Psychiatry 38 years experience
3 weeks or more: Most ssris start to show effectiveness against depression about 2 weeks after starting them. Prozac (fluoxetine) is about 1 week slower due to its long half-life (it takes longer to reach a steady blood level). So a good estimate is about 3 weeks. But everybody's different; some people feel better faster, others need to wait longer. Also, improvement is gradual, it doesn't become "effective" all at once.
Created for people with ongoing healthcare needs but benefits everyone.
6k viewsReviewed >2 years ago
Last updated Oct 17, 2017
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