They are not intended to be used as a smoking cessation drug and they are not being marketed in that way. They are an alternative way to use nicotine. This method is considered safe by the UK’s MHRA.
This is probably the best way to describe it, as an alternative way to smoke that lowers your risk profile significantly compared with tobacco cigarettes.
Side effect: People who use electronic cigarettes frequently – in fact, very often – stop smoking tobacco altogether. They have gotten rid of 99 percent of the tobacco-related risks, even though they are not quitting Nicotine.