You may want to Research it..but I think Prozac takes 25 days for it to be gone from ones system. So stopping it suddenly one would experience SSRI withdrawl symptoms and underlyng
Psych issues could be amplified.

Honestly, I am surprised that a Doc would suggest stopping Prozac without a taper. My SSRI only takes 6 days to be out of my system, but Prozac takes 4 x's longer.