can smoking cigarettes make you throw up What Nicotine Does to Your Body Tobacco smoking - Wikipedia

this has been shown to be counter-productive

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According to the American Cancer Society, some of the chemicals formed in e-cigarettes are propylene glycol (increase irritation of the lungs and airways after concentrated exposure), formaldehyde (a cancerous substance that may form if the e-liquid overheats or not enough liquid reaches the heating element), and metals that have been linked to cancer (lead, nickel, chromium, manganese, and arsenic).[15] An estimated 61.4 million people in the United States, reported having a disability.[16] Students with disabilities in university settings, had a higher rate of tobacco (chewing and smokeless tobacco, cigarettes, cigars, and pipes) use compared to those without disabilities

Some participants acknowledge that there may be a reduction in certain harmful substances when compared to traditional cigarettes, yet they remain cautious: Yes , they may be somewhat less harmful than cigarettes to some degree