For some reason what I just typed did not post. What I said was:
I’ve never taken Prozac, but I know a lot about it. I recently read (and posted a question about it a few days ago) that they’re using Prozac now for weight loss.
Your doctor may be starting you on a low dose to see how you tolerate the drug. If this is the case, don’t expect to see any changes until he increases your dose enough to reach the normal therapeutic minimum.
Assuming you ARE on that dose, yes, expect a couple of weeks before you feel any changes.
All of the people I know on Prozac think it’s a miracle drug.