Sara Reardon in Nature:
Psychedelic drugs have been undergoing a major makeover in psychiatry, earning mainstream acceptance that has eluded them for decades. In 2019, a variant of ketamine — an animal tranquillizer well known as a club drug — was approved by the US Food and Drug Administration (FDA) for treating post-traumatic stress disorder (PTSD). In May, Oregon opened its first treatment centre for administering psilocybin — the hallucinogenic compound found in magic mushrooms — following the state’s decision to legalize it (psilocybin remains illegal at the federal level). And, after decades of effort, the Multidisciplinary Association for Psychedelic Studies, a non-profit research organization in San Jose, California, formally asked the FDA for approval to market MDMA — also known as molly or ecstasy — as a treatment for PTSD.
Most specialists expect the MDMA approval to go through on the weight of clinical evidence and popular support. Two large trials have shown that the drug can reduce the symptoms of PTSD when administered in controlled therapy sessions1,2. And it seems to do so more quickly than other treatments. But how MDMA and other psychedelics work is still largely a mystery, both because the drugs have long been illegal and because psychiatric conditions are difficult to study in animals.
More here.