1 doctor weighed in:
How long does Prozac (fluoxetine) take to show effect, and what are withdrawals like?
1 doctor weighed in

Dr. Alan Ali
Psychiatry
In brief: Prozac (fluoxetine)
Depending on what it's used for & dosage, onset is 1 week & up to 4 weeks.
In brief: Prozac (fluoxetine)
Depending on what it's used for & dosage, onset is 1 week & up to 4 weeks.
Withdrawal can include upset stomach, nervousness, sleep pattern changes, headaches.
Dr. Alan Ali
Dr. Alan Ali
Thank
Get help from a real doctor now
Dr. Eric Weisman
Board Certified, Neurology
32 years in practice
9M people helped
Continue
108,000 doctors available
Read more answers from doctors