It will kill him, but he can't stop. His mom died at 55 of a massive heart attack so we have this lovely genetic thing in his family. I love him and cant' imagine life without him. He doesn't go to doctors either though. He isn't allowed to smoke at home and usually doesn't (when he does, I can feel it in my lungs and call him; out on it). But at work, well, he's the mechanic for our cab company and everyone smokes, making it harder. He has quit five times and always goes back to it. He gets a lot of respiratory infections. I don't. Hmmmmmmmmm...yet I know it's very hard to quit. Anyone have tips I can pass along to him? He has tried the gum, the medication, and being hypnotized .