Alcohol abuse is more harmful than crack or heroin abuse, according to a study by a former British government drug advisor and other experts.

Neuropharmacologist David Nutt, MD, of Imperial College London, and colleagues rated 20 different drugs on a scale that takes into account the various harms caused by a drug. Drugs are rated on nine harms a drug causes an individual and seven harms a drug causes society. Read more about Alcohol More Harmful Than Crack or Heroin