The US has denied a bid to allow MDMA, commonly known as ecstasy or molly, to be used in the treatment for post-traumatic stress disorder (PTSD).
The US Food and Drug Administration (FDA) was examining the psychedelic drug made by Lykos Therapeutics to treat the mental health disorder in combination with talk therapy.
IIRC, advocates in this space were expecting this outcome. The research around MDMA-based treatment is promising but not quite there yet.
Psilocybin-based treatment, on the other hand, is looking more solid.
Ketamine as well.