I've been taking 60mg of prozac for about a month now, before I was taking 40mg but my doctor suggested 60mg. When I was taking 40mg, I would take one pill in the morning and 1 pill at night. Now (suggested by my doctor) I take all 3 pills in the morning. He said if I start feeling tired/fatigue to go back to 40mg, but I'm not sure if this will go away or not.