"for me, prozac was unfortunately not so much of a success. i didn&#039;t feel worse but i didn&#039;t feel great either. i started taking it in oct 2016 with a dose of 10 mg, then upped to 20mg and eventually to 40 mg. so really i changed doses 3 times in 3 months. (which is probably not the best since you don&#039;t get to get use to the drug.) but anyways i wasn&#039;t feeling any better. still felt down and very depressed. my psychiatrist has officially switched me to venlafaxine (which i&#039;m afraid of, since the reviews of that drugs aren&#039;t all positives). i have to say,  while on the prozac,  sometimes i felt good but the majority of the time, i felt very depressed (not because of the drug). my side effects were fatigue and diarrhea."