It has happened to me. I was on Prozac/Strattera starting August 2005 for 2 months and immediately got off of it b/c misdiagnosed with Unipolar when I was Bipolar. Side effects included severe manic episodes.

May 2006 I was put on Prozac again once I was relatively stable, while on Seroquel and Lamictal also. Side effects included extreme lack of sex drive and nausea when focusing on something. Very awful side effects, I stopped after a week