The opioid epidemic is reshaping life in America, including at the local public library, where librarians are considering whether to carry naloxone to battle overdoses. At a time when the public is debating arming teachers, it is another example of an unlikely group being enlisted to fight a national crisis. Philadelphia became the poster child for naloxone-toting librarians last year after the Inquirer wrote about a library where one woman had revived several people. Cities including Denver and San Francisco have also started training library staff to use the drug, which comes in the form of a nasal spray and is commonly known by the brand name Narcan. But outside major cities, librarians are weighing whether to stock the drug, too. Across New York State, like in much of the country, they describe struggling with overdoses — one more sign of the severity of the opioid crisis, which killed roughly 64,000 people in the United States in 2016, and of the rise in heroin and fentanyl abuse.