Hey I just found out more about why nicotene causes adrenal response. There are nicotinic receptors on the autonomic ganglia, both sympathetic and parasympathetic, as well as in the adrenal medulla and in the neuromuscular junction. There must be a lot more effects than anybody is talking about!

Congrats again. You are doing well. I know it's hard. I have never been hooked but I have watched a number of friends go through quitting. Have your read The Easy Way to Quit Smoking by Carr? It's not super-sciency but it does explain a lot about the way that nicotene gets a person hooked.