Are you taking the prozac for a TMS related problem? How long have you been on it?
I have no idea about antidepressants except that many do work for pain as well & that many people will take some kind of antidepressant in conjunction with a TMS programme.
Also that there may be some problems initially while adjusting to the drug.
I don't feel that we are qualified here to answer your question with enough authority so it's something you should broach with your doctor. It may be that you need to switch to a different medication or adjust your dosage.
Mala