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Food & Drug Administration campus in Silver Spring, Md. Federal officials are encouraging generic drugmakers to reformulate their painkillers to make them harder to abuse, the latest in a string of steps designed to combat abuse of highly-addictive prescription pain drugs. On Thursday, March 24, 2016, the FDA published draft guidelines outlining testing standards for harder-to-abuse generic painkillers. (AP Photo/Andrew Harnik)

Food & Drug Administration campus in Silver Spring, Md. Federal officials are encouraging generic drugmakers to reformulate their painkillers to make them harder to abuse, the latest in a string of steps designed to combat abuse of highly-addictive prescription pain drugs. On Thursday, March 24, 2016, the FDA published draft guidelines outlining testing standards for harder-to-abuse generic painkillers. (AP Photo/Andrew Harnik)