A December 2017 study by the University of Pittsburgh Schools of the Health Sciences, published in the American Journal of Medicine, found that young adults who use e-cigarettes are more than four times as likely to begin smoking tobacco cigarettes within 18 months as their peers who do not vape
The strength of tobacco based on nicotine content is typically medium to strong
Nguyen-Grozavu FT, Pierce JP, Sakuma KLK, et al
"Short-circuiting this feedback loop can cover up unresolved trauma, interfere with family and career, and cause emotional arrest." Switching one drug for another ignores rather than resolves the underlying issues so it is usually not a good long-term solution, according to Karan
As of late last year, all US states require sellers to have a retail licence, and sales to people under 21 are banned