Usually there are side effects, which should diminish with time. I found Prozac
did not suit me at all, but it suits lots of other people. My side effects
were so bad I had to stop the 10mg dose within a few weeks.
We all react differently to drugs, what suits one person, may not suit another. You have not been on Prozac long, so you may need to give it time to get into your body. If you really think the side effects are too bad, then I suggest you go back to the doctor.