(David McNew/Getty)

According to the government, it's illegal to use weed as medicine.

Nine years ago, proponents of medical marjuana asked the DEA to reconsider the federal goverment's classification of cannabis as a "highly dangerous drug" in the vein of heroin and other drugs. Earlier this week, the DEA made its decision, ruling that marijuana has "no currently accepted medical use in treatment in the United States." Supporters of medical marijuana, which is currently legal in 16 states, say they will appeal the decision.