The adolescent death rate from drug overdoses increased to 3.7 per 100,000 in 2015 after gradually declining to 3.1 from a high of 4.2 per 100,000 in 2007, according to a new report by the Centers for Disease Control and Prevention. Overdose death rates for girls aged 15-19 nearly doubled between 1999 and 2004, and tripled for boys between 1999 and 2007, the report notes. The majority of deaths in 2015 were unintentional and from opioids, specifically heroin.