For many years, tobacco control researchers have speculated that nicotine delivery systems that allow the smoker to inhale nicotine similar to a cigarette, but without exposure to tobacco combustion products, would be much more acceptable and attractive to smokers than nicotine medications (nicotine replacement medication; NRT) and would substantially benefit public health. Smokers would be able to switch to a satisfying form of nicotine self-administration to manage their nicotine addiction without most of the harm from combusted tobacco. E-cigarettes were originally conceived and developed to meet such a need and can be considered a form of NRT. Epidemiological studies and a large clinical trial show that e-cigarettes are more effective than NRT alone for smoking cessation. ^, 

中文翻译：

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电子烟和尼古丁双重替代疗法可用于戒烟。

多年以来，烟草控制研究人员推测，尼古丁输送系统可以使吸烟者像香烟一样吸入尼古丁，但不暴露于烟草燃烧产物，比尼古丁药物（尼古丁替代药物; NRT），将大大有益于公共卫生。吸烟者将能够转换成令人满意的尼古丁自我管理形式，以管理其尼古丁成瘾，而不会因燃烧烟叶带来大部分伤害。电子烟最初是为满足这种需求而设计和开发的，可以认为是NRT的一种形式。流行病学研究和一项大型临床试验表明，电子烟比单独使用NRT戒烟更有效。^，