I'm admittedly sort of split on Prozac. It brings up the lows, yes, but at least for me, it also really brought down the highs as well. And when my highs aren't exactly all that high to begin with, it makes me feel like I'm in a perpetual state of "blah".
I'm sorry to hear that, for me it's like enough of a weight has been lifted, I'm able to see, feel, or explore things I haven't noticed before. If this is a reduced "up" it's till better than things were before