1) 7 days is a long time. 2) I believe you are confusing the common progressive dosage regimens with delayed effects. The reason fluoxetine typically takes time

1) 7 days is a long time. 2) I believe you are confusing the common progressive dosage regimens with delayed effects. The reason fluoxetine typically takes time before you feel effects is because you take a small daily dose that build up in your system over time. It builds up since dosing is more frequent than the drugs half life. 3) Acute intake is associated with side effects, not just acute withdrawal.