I stopped taking Fluoxetine on Sunday because it was making my anxiety much worse rather than better (was on it for 4 weeks and seeing no improvements, just feeling worse). I'm still feeling the heightened anxiety and some of the tiredness (and nausea) from the tablets and just wondering how long it takes to get out of the system? I was on 20mg a day and because of anxiety and stopped taking it without withdrawing as I was on it for just under 4 weeks so not long enough to need to withdraw slowly.