CNN's Dr. Sanjay Gupta speaks with an addiction specialist about a new study ranking the harmfulness of popular drugs.
http://cnn.com/video/?/video/health/2010/11/06/gupta.seppala.drug.addiction.cnn
CNN's Dr. Sanjay Gupta speaks with an addiction specialist about a new study ranking the harmfulness of popular drugs.
http://cnn.com/video/?/video/health/2010/11/06/gupta.seppala.drug.addiction.cnn