Here are my top five worst drugs: 1. Meth. I think this is one of the most addictive drugs out there. It messes you up and once you start you just cannot stop. It can leave you messed up for 12 hours straight! Add to that, it is mostly chemicals and has no natural ingredients in it. 2. Krokodil. It rots people flesh literally! I read that people who use this drug has a life expectancy of 1-4 years. Twisted, right? People had lost limbs, other body parts and has their skins teared off because of this drug. 3. Cocaine. Probably because this drug has ruined a lot of lives. 4. Tobacco. Kills you slowly. 5. Alcohol. This has killed many lives either the alcoholic or sometimes the innocent people who got hit by the alcoholic.