At least seven people in Wisconsin have been hospitalized with severe bleeding in the last three months after using synthetic marijuana containing rat poison. The State Department of Health Services said in a statement Thursday that Wisconsin has had 15 cases, seven confirmed and eight probable, since March. The confirmed cases took place in Dane, Milwaukee and Outagamie counties. There have been at least four deaths from similar cases in Illinois. The DHS urges anyone who has serious reaction after using the drug to call 911.