There has been a study of that on ketamine, where they used patients who needed to be put under anaesthetic for other reasons. I'll try and find it in a bit...

There has been a study of that on ketamine, where they used patients who needed to be put under anaesthetic for other reasons. I'll try and find it in a bit... Edit: found it https://www.astralcodexten.com/p/does-anaesthesia-prove-ketamine-placebo https://www.astralcodexten.com/p/does-anaesthesia-prove-keta...