Cocaine vaccine may reduce 'use'

[Banrion]

A vaccine to treat cocaine use helps some addicts to halve their dependency on the drug, researchers say.

http://news.bbc.co.uk/2/hi/health/8291681.stm

Interesting. I saw basically just this blurb in the elevator, and wanted to know more. I did not know you could target chemicals like this with a vaccine.