Vaping Lung Injuries: Warning Signs & Emergency Care Most e cigarettes (vapes) contain nicotinethe addictive drug in regular cigarettes, cigars, and other tobacco products. Nicotine can harm the adolescent brain which continues developing until about Most e cigarettes (vapes) contain nicotinethe addictive drug in regular cigarettes, cigars, and other tobacco products. Nicotine can harm the adolescent brain which continues developing until about age 25. Using nicotine in adolescence Nicotine and Digestion: Does Nicotine Make You Poop? GoodRx Why Do I Feel Sick After Vaping? Here's What You NEED to Know! Vaping transformed me into a nicotine fiend. Quitting has been a year long project Health & wellbeing The Guardian