Emanuel announced on Tuesday that the City of Chicago has filed a lawsuit in Illinois state court against five pharmaceutical manufacturers for allegedly misrepresenting the benefits of opioids, a class of highly addictive narcotic painkillers, and concealing the serious health risks associated with these drugs.

http://www.illinoisobserver.net/2014/06/03/emanuel-opens-new-front-illinois-heroin-crisis-suing-drug-companies/