In a previous blog post, I hypothesized that taking too much lithium is the cause for the flatness that some people experience.
After reading a lot more, I have to correct myself. Apparently lithium just makes some people feel flat. Period. It doesn't happen to me. But it does happen to some people. It's a side effect that you might or might not have. And it probably has more to do with individual differences than dosage.
I'm sorry if lithium makes you feel flat. I hope that you will find a medicine that does work perfectly - removing the mania and depression but allowing for life's normal ups and downs. That's how it should be.