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He mentions that he's trying to quit, and his girlfriend's mother offers to hypnotize him to help him break his habit

13 Potential adverse events reported in nonpregnant adults include higher rates of low-risk cardiovascular events, such as tachycardia

It has also been reported as a minor side effect in several studies

LONDON -- A major scientific review of available research on the use, content and safety of electronic cigarettes by the medical journal Addiction has concluded that although long-term health effects of e-cigarette use are unknown, compared with conventional cigarettes, they are likely to be much less harmful to users or bystanders

The trend has attracted many non-traditional smokers as well, with aficionados enjoying the wide variety of flavours, equipment and other associated merchandise, often sans nicotine