What is the addictive drugs in tobacco?

The main addictive drug in tobacco is nicotine. Though many people who switch to Nicotine Replacement Therapy (such as Personal Vaporizers (E-Cigarettes), Gum, and Nicotine Patches often find that they do not get the same feeling as with cigarettes. There are many chemicals in cigarettes that give you the rush and relaxation of smoking a cigarette, but nicotine is proven to be the most addictive.