What if you could get all the potential benefits of ketamine without the "trip"? For part two of our series on psychedelics, we look at how some researchers are trying to disentangle the "trip" from the drugs' effects on the brain — and why the answer could help direct the future of psychedelic research. (Spoiler alert: People generally know if they're tripping or not.) This episode: a researcher navigating this challenge by putting his patients to sleep.

Catch the rest of this series on psychedelics and related drugs this week by following us on Spotify and Apple Podcasts.

Have other questions about psychedelics and the brain? Let us know by emailing shortwave@npr.org!

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