Several states distribute Naloxone hydrochloride, also called Narcan, to treat opium-based drug overdoses. But only one company manufactures the drug, and the price has spiked in recent years. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP

Soldiers in the Afghan National Army's 6th Kandak (battalion), 3rd company, search a local farmer's poppy field during a joint patrol with U.S. forces in Kandahar province in March of last year. Andrew Burton/Getty Images hide caption

itoggle caption Andrew Burton/Getty Images