The state poison center is starting to get calls about a dangerous new synthetic drug called 2C-E.
The effects are similar to ecstasy or LSD and overdose symptoms include agitation, paranoia, violence, and high heart rate.
One overdose victim was found running naked around a lake.
There have been no deaths in Illinois, but 2C-E overdoses have killed people in other states.
A study is being conducted to determine whether dogs are messing up the water at beaches along Chicago’s lakefront.