b'Last month, the FDA approved esketamine, the nose spray version of ketamine, for treatment-resistant depression. You probably know by now that ketamine is a party drug, but it actually finds far wider use as an anesthetic on the World Health Organization\\u2019s list of Essential Medicines. Scientists have a good idea of how exactly it brings about its anesthetic charms, on account of it interacting with certain receptors in the brain.\\nLearn more about your ad choices. Visit podcastchoices.com/adchoices'