Description:The U.S. government classifies marijuana—along with heroin and LSD—as a Schedule I drug, the most tightly restricted category of drugs in the United States. According to the federal government, Schedule I drugs are unsafe and have "no currently accepted medical use in treatment in the United States." Really? As medical marijuana proponents have pointed out since the Controlled Substances Act was passed by Congress in 1970, cannabis has been used medicinally for thousands years.(10:24)