I'm a smoker too, and I can completely relate. It definitely exacerbates the nausea and panic symptoms brought out by this phobia, and one would think those reasons alone would be solid enough to quit. But i'm addicted to cigarettes too, and although it has a toxic effect on health, it also temporarily alleviates stress. It's like a contradicting form of self-medication for me. But anyways, it definitely makes panic and nausea worse for me too.