 [ Symptoms ] does secondhand smoke go through a machine that makes oxygen off room air is it dangerous to people with copd  i have emphysema and quit smoking 6+ years ago when diagnosed i was able to get off oxygen after leaving the hospital and manage to work three years ago i have moved to a building where the person on the other side of the wall is a heavy smoker since then i have become dependent on an oxygen machine could this second hand smoke be the cause of my decline over the past three years and does it get sucked through the oxygen machine [ Disease ] there are no studies that link nicotine gum to throat cancer otherwise it would not be on the market nicotine via cigarettes are another story entirely it is other cancer causing chemicals in tobacco and there are many that have been linked not the nicotine