Ketamine is not a new medication. It has been around for many years, but was used primarily as an anesthestic drug. Ketamine is an NMDA receptor blocker. It works differently from narcotics and antidepressants. For depression and PTSD, ketamine works by allowing new connections to form in your brain. The positive ketamine effects continue to work even after the infusion.
Ketamine infusions have been used successfully to treat: