I've taken prozac but at the time it was the only med I was on. I personally had no problem with it. No results either. It was like I wasn't taking anything at all. Of course every med affects everyone differently. The prozac in combination with the other meds may very well make it's effects different as well. If you feel you are having a significant problem with the drug, you should consult with your physician.
Good judgement comes from experience and alot of that comes from bad judgement.