Smoking affects neurotransmitters including dopamine which is found in the 'reward center' of the brain. Wherever *that* is. 93% of mentally ill people smoke. We are self medicating. And it helps for sure.
I notice that when i am manic or in a mixed state i smoke much more than normal. Nicotine fits are closer together and more intense. And cigarettes are more satisfying.
So there is an upside to crazy after all!