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Body’s natural pain killers can be enhanced
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Body’s natural pain killers can be enhanced

by Kelly Malcom,  University of Michigan Credit: CC0 Public Domain Fentanyl, oxycodone, morphine—these substances are familiar to many as a source of both pain relief and the cause of a painful epidemic of addiction and death. Scientists have attempted for years to balance the potent pain-relieving properties of opioids with their numerous negative side effects—with mostly mixed...