Hormones control all bodily processes in humans because they affect everything from metabolism and mood through reproduction and sleep. However, one of the most important yet often misunderstood ...

Brain cells (magenta) in the reward center of a rat’s brain release dopamine in response to opioids. According to a new study by WashU Medicine researchers, male and female rats with a chronic pain ...

While opioids are incredibly powerful pain management tools, they can also be highly addictive. Since 2013, the rate of deaths from an overdose due to synthetic opioids, like fentanyl, has steadily ...

The opioid epidemic has claimed more than half a million lives in the U.S. since 1999, about three-quarters of them men, according to the National Institutes of Health. Although men's disproportionate ...