Photo by: Chris Knight

FILE - This Jan. 26, 2011 file photo, shows containers of bath salts in Mechanicsburg, Pa. There’s been a two-year surge in the use of synthetic drugs that are made of legal chemicals but mimic the dangerous effects of cocaine, amphetamines and other illegal stimulants. The drugs, which are often sold at corner stores as bath salts, incense and plant food for as little as $15, can trigger bizarre and violent behavior. (AP Photo/The Patriot-News, Chris Knight, File)