A vape where he can control the nicotine and lower it progressively works well. Start kinda high while he gets off cigarettes and lower it once he starts to thi

A vape where he can control the nicotine and lower it progressively works well. Start kinda high while he gets off cigarettes and lower it once he starts to think of cigarette smoke as less appetizing than before. I found that nicotine is not the only addicting thing about cigarettes, and I don't mean just the habit, so vaping helps as an intermediate step.