• Many young people who use e-cigarettes also smoke cigarettes.There is some evidence that young people who use e-cigarettes may be more likely to smoke cigarettes in the future.
• Specifically, a 2018 National Academy of Medicine report found that there was some evidence that e-cigarette use increases the frequency and amount of cigarette smoking in the future.
• E-cigarettes also can be used to deliver other drugs, including marijuana; in 2016, approximately one-third of U.S. middle and high school students who have ever used an e-cigarette reported using marijuana in the device.
• But e-cigarette use among young people is still unsafe, even if they do not progress to future cigarette smoking.