It is tricky. It is different from other addictions. It is not predominantly either the high from using that is addicting (there isn t much compared to cocanie or amphetamine) nor is it associated with the withdrawal type symptoms of narcotic addiction. Nicotine is chemically closely related to chemicals that are used to run all of the body s functions (heart rate, breathing, digestion, etc). Chewing tobacco might not be associated with asthma... depends on the person. But withdrawal from cigarettes will be associated with feeling awful because the body gets used to the nicotine and doesn t have digession, breathing, heart rate, sweating, run the way it normally would. So, first to come off of an addiction you have to want to. In particular the need to quit has to be associated with an immediate sensation as fast and intrusive, and strong as the cues to use. Asthma would be one. Just thinking it would be good to quit would NOT. Then nicotine replacement is good, like a patch or lozenge. This has to be tapered lower over time.. Then there are a the particular triggers and how to handle them. Tricky.