I have been taking 20mg of Prozac for 8 weeks now and whilst it has helped with my anxiety and depression to a degree it has caused me to feel so fatigued that I often have to sleep in the afternoon (even though I am sleeping anything from 10 hours upwards at night). I am not able to function like this and am keen to get back to work. Is 8 weeks long enough to give it for the fatigue to subside or should I try something else. I am not keen to start again unless I have to and had every side effect with the Prozac. The fatigue in itself is now making me anxious as I am afraid I won't be able to function normally again (without falling asleep). Should I give it another month? Any past experiences would be greatly appreciated. I take the Prozac at night.