Drugs that target opioid receptors sometimes have severe side effects. Thousands of people around the world die every day from overdoses involving opioids such as fentanyl. Researchers have taken a ...

Opioids slot into opioid receptors and activate them. This sends signals to your brain to relieve pain and promote pleasure. Both endogenous opioids, which your body naturally produces, and exogenous ...

Can nerves fight skin cancer? New research shows sympathetic nerves reprogram immune cells to slow melanoma tumor growth.