Which drug has the worst addiction potential?

Which of the following drugs has the worst addiction potential in terms of severity of cravings, pain & suffering of withdrawl, and lowest "complete" recovery rates? - Alcohol - Heroin - Cocaine - Methamphetamine - Crack Cocaine I’ve heard from a fifteen year old heroin addict that heroin is a drug that if you’ve done [...] http://bit.ly/pVWqfP