As if there wasn't enough to worry about already, squirrels are now vaping in various major cities across the globe. Wildlife experts warn that this behavior could pose serious danger to the Psychiatry.org E Cigarettes and Vaping Understanding Vaping: Can It Cause Sickness? 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 Do Disposable Vapes Expire? Aquios Why Is My Disposable Vape Hard to Pull? Quick Fixes That Work Mellow Fellow