It seems cocaine has been behind a rash of flesh-eating disease outbreaks in Los Angeles and New York. Cocaine cut with the veterinary drug, levamisole has apparently been linked to a number of cases of rotting flesh, according to Good Morning America. While the cases reported thus far have been on the coasts, officials have warned that it could very well be a nationwide problem.
Link
The Stranger (an awesome alt paper in Seattle) has done an excellent series of articles on Levamisole-tainted cocaine.
Below is a link to one of the articles. They also have articles on where to get levamisole test kits and how to make them yourself.
http://www.thestranger.com/seattle/the-mystery-of-the-tainted-cocaine/Content?oid=4683741
Solution: Get a better dealer.
And, how can the FDA get on a substance that isn't legal or regulated? How would they do anything about it?