Cigarette lectronique : glouglou, crpitements, claquements pourquoi ? E cigarettes may not contain tobacco, but they still deliver nicotine, a highly addictive substance that can harm the developing brain, increase blood pressure, and lead to long term addiction. Many also contain toxic 18.1 E cigarette products and the e cigarette market Tobacco in Australia Cohort study of electronic cigarette use: effectiveness and safety at 24 months Tobacco Control