A nasal spray that contains esketamine — a potent derivative of ketamine — can now be taken on its own to treat adults with severe depression, the FDA says. Here's what that means.

Suzetrigine prevents pain signals from reaching the brain and doesn't give an opioid-like high, making it non-addictive—but ...

The drug, shown to be almost as effective as opioids for short-term pain, is the first fundamentally new kind of painkiller ...