snet ♪ ♪ >>> you are probably wondering what became of tim, the former prosecutor i met hin coloradodown. >> i felt like someone was poisoning the water that i was drinking. i felt like i was crazy. like, i could not leave the apartment. >> anti-depress ants and anti-anxiety meds did not work for him. but a psychiatrist recommended something new. >> i started to talk to him about the idea of doing ketamin >> it's currently the only legal psychedelic medicine in the u.s. >> when i heard about it for depression, i thought, that was very weird, why would a general anasthetic that puts you to sleep, how does it help depression? >> around 20 years ago, psychiatrists started to experiment with it and found it could provide fast relief for some on the brink of suicide. >> i started only with suicidal patients and then, branched out and realized that it was helpful for a lot of people and to the point where now, three years later, i, it's hard to imagine how i practice without it. i'm rarely hospitalizing people for depression or ptsd. >> the doctor asked if i wanted to try one of the treatm