Men get more relief than women do from painkillers like morphine, according to some studies. New research, conducted by Anne Murphy, a neuroscientist at Georgia State University in Atlanta, hints at a possible explanation: Male rats have more receptors for the drug in a brain region involved in pain processing. Although it's not yet clear whether the same is true in humans, researchers say the study underscores the need for more research on the sex-specific effects of pain drugs. (source: sciencenow.sciencemag.org)
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