The drug, esketamine, is a new kind of antidepressant for people who haven't responded to other treatments.
"It can generate a sense of detachment from the body and the self and, at higher doses, a full-blown dissociative experience."
Combining drugs is never a good idea, but that doesn't stop a lot of people from doing it.
"My family had no idea: I drink a lot of Diet Coke and they just thought I was hyper or, when I was coming down, they thought I was just having a depressive moment."
The scientists used the DNA of Lonesome George, the last known Pinta Island tortoise.
A first responder told us everything that's most likely to go wrong.
Headlines in science you won't want to miss
The proportion of 16 to 24-year-olds using Class A drugs is now the highest it's been for 12 years.