Volunteer Patrick Pezzati searches yards in Turners Falls, Mass., for discarded heroin needles. Karen Brown/WFCR hide caption

itoggle caption Karen Brown/WFCR

Volunteers search for needles and other drug paraphernalia along Church Street in Austin, Ind., in April. The region has recorded 142 new HIV cases since December, according to the state, in an outbreak tied to injected-opioid use. Seth Herald/Nurphoto/Corbis hide caption

itoggle caption Seth Herald/Nurphoto/Corbis
Frederica Boswell/NPR

In Philadelphia, some drug users are selling clean needles from needle exchange programs on the street. Researchers say the black market isn't necessarily a bad thing. ImageZoo/Corbis hide caption

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Tina Wolf demonstrates the use of naloxone to community members in Lindenhurst, N.Y., during an overdose prevention training. Georgia Dolan-Reilly (left) of the Suffolk County Prevention Resource Center helped with the training. Kevin Hagen for NPR hide caption

itoggle caption Kevin Hagen for NPR

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