Teens will take medications from their home medicine cabinets, mix them in bags together indiscriminately and make "trail mix" to pass around parties
"Cheese" is a combination of heroin with cough and cold preparations. The heroin concentration in cheese is typically between 2-8% compared to 30% found in black tar heroin, and is considered "starter heroin"
Prosser JM, Nelson LS. Emergency Medicine May 2008