Prozac, day 4 I take 20 mg in the morning so far, I wake up feeling better than before, but, some time every day I have a tired spell, and need a nap, I have been severely depressed for nearly 9 months, and never before, I am 45 and have plenty to keep busy with. I don't have a girlfriend right now which is new for me so I don't really have anyone to tell me of any changes . But only tired side effects so far. But its still early .