Usually, the composition of electronic cigarette liquids is as follows: Vegetable Glycerine (VG) Propylene Glycol (PG) Concentrated flavours for electronic cigarettes Liquid nicotine Some people, perhaps because they are allergic to propylene glycol or because they prefer full-bodied liquid and vapour, decide to use liquids only with vegetable glycerine (plus possibly flavourings and nicotine)
If the intended use involves the diagnosis, cure, mitigation, treatment, or prevention of a disease, there is an argument the nicotine-containing product should be designated as a drug. There are currently five types of FDA-approved nicotine-based therapies on the market as smoking cessation aids: the nicotine patch, gum, lozenge, spray (Rx only), and inhaler (Rx only)
It is very popular among youth, as it can be consumed discreetly anywhere, especially in classrooms
It is either chewed or held in place and the saliva is spit or swallowed