CNN Sanjay Gupta MD December 7, 2014 12:33:00
>> parents across the country are now learning the painful truth about synthetic designer drugs. >> investigators say he overdosed on a synthetic marijuana -- >> otherwise known as k-2. >> reporter: with deaths and overdoses reported almost daily. >> poisons a 15-year-old girl. >> 16-year-old -- >> life bankruabruptly ended at 18 years old. >> these drugs are being marketed and sold as legal alternatives to marijuana, cocaine, methamphetamine, lsd and heroin. >> reporter: in the last four years, more than 300 synthetic designer drugs with names like spice, n-bomb and bath salts have flooded in...