> If you mean Hallucinogens, they have been studied extensively and don't seem to be medically useful.
Eh? Studied extensively? Last time I checked they're all schedule I and haven't really been studied since the 70s. On top of that, in the few recent studies that have focused on them, hallucinogens do seem to be medically useful. MDMA for PTSD, psilocybin for terminally ill patients, etc.
MDMA's most infamous use that I am aware of, and which you didn't mention, is for the temporary but complete relief of the symptoms of Parkinsons. In addition I'm sure it would also be ideal for fostering empathy and discussion to come to terms with the imminent loss of terminally ill loved ones. I believe the Swiss have looked in to it for marriage counseling.
Eh? Studied extensively? Last time I checked they're all schedule I and haven't really been studied since the 70s. On top of that, in the few recent studies that have focused on them, hallucinogens do seem to be medically useful. MDMA for PTSD, psilocybin for terminally ill patients, etc.