Many smokers have reported that switching from cigarettes to e-cigarettes has helped their physical well-being, including reduced coughing.
But a few randomized clinical trials examining the use of e-cigarettes as a cessation tool have shown mixed results. While some trials demonstrate a significant increase in cessation success (from 9.9% to 18%), people using e-cigarettes were much more likely to remain dependent on nicotine as compared to those randomized for more traditional nicotine replacement products, such as nicotine patch, gum and nasal spray. Or, they were more likely to relapse to using cigarettes.
In short, whether, how, and to what extent e-cigarettes have potential as a cessation tool is not yet settled, especially considering that more than 80% of smokers randomized to use e-cigarettes continued to smoke after the cessation trial.
Safer than a spitting cobra
Cessation claims aside, the messaging of e-cigarettes as a “safer” alternative may have led many of the 3.6 million teenagers in the U.S. who use e-cigarettes today to believe these devices are “safe.” “Safer” does not equal “safe,” and the messaging of “safer” was based on comparisons to cigarettes.
Source: Vaping likely has dangers that could take years for scientists to even know about : The Conversation