"i was on prozac for 10 years. it was a wonder drug for me. i had breast cancer last year and the prozac stopped working for me because of the chemical changes in my body. i have tried lexapro, zoloft and now i&#039;m on celexa. the side effects on the celexa are horrible. i just want to find an antidepressant that works like prozac. i stopped taking prozac in april 2010 cold turkey and had no withdrawals."