"i suffer from major depression/anxiety. i would cry, panic, and feel negative about everything. i tried lexapro in my teens and it worked great for me. however, when it returned years later my doc suggested 20mg prozac as it would be more &quot;energizing&quot;. the first 2-3 weeks were unpleasant side effects such as fatigue, increased anxiety, and insomnia. after the 3rd week up until the 5th week i did gradually feel better, i didn&#039;t cry or really feel depressed anymore. however, at the 6th week it seemed to stop working, i began to feel more anxious than depressed again, and felt very uneasy all the time, plus i experienced digestive issues. also, i feel no more energized whatsoever. prozac helped me somewhat, but it didn&#039;t really do it for me."