"young male early 20s. i suffer from major depression as well as anxiety. i tried 20mg prozac only because it supposedly gives people more energy. the first 1-2 weeks i experienced side effects such as extreme fatigue and increased anxiety. after 2-3 weeks i began to feel better, however, it worked until it seemed to stop after about a month. it still helped relieve my symptoms slightly, but i had returning feelings of fear, panic, negativity etc and never felt more energized. i stopped taking it and after 3 days immediately felt much better. i ended up switching back to 10mg lexapro because it worked great for me. prozac helped somewhat, but for those who struggle mostly with depression/anxiety, i&#039;d try more selective ssris personally."