"i have been on prozac for only 6 days. i noticed a mild improvement where my depression episodes weren&#039;t so severe. the thoughts of suicide are subsiding, but i&#039;m beginning to feel a bit absent minded. there are times of the day that i feel very tired or sleepy, but i don&#039;t feel like crying or over reacting for everything. my doctor said that the level needs to build up in my system.  i hope i keep feeling better and the blah feeling improves. decreased libido? i didn&#039;t have much to begin with. i noticed no change."