Live data from Hacker News

Ketamine no better than placebo at alleviating depression, unusual trial finds

science.org

21–30 of 196 posts

Re: Ketamine no better than placebo at alleviating depression, unusual trial finds

#21
I think the criticism of this is unfair, and this result will help shed light on the mechanism. Look at the current theories for molecular mechanisms:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5999402/

If these are accurate does it make sense for them to be entirely inhibited by general anesthetic?

Re: Ketamine no better than placebo at alleviating depression, unusual trial finds

#22

> They gave volunteers ketamine while they were under general anesthesia, theoretically preventing the participants from going on a trip. Maybe it's the trip that helps.

And you object to them trying to find out if it does?

The problem is that their conclusion is not going to be read as “wow, it’s the trip that helps more than just the chemical.” Instead it’ll be read as “well I guess this chemical doesn’t work at all.”

The notion that the trip is the therapeutic element seems oddly frightening or threatening to a lot of people.

… Or at least it’s not what they’re looking for. The quest is for a pill that works deterministically without any need to involve consciousness.

Re: Ketamine no better than placebo at alleviating depression, unusual trial finds

#24
post #14

Earlier quoted context omitted.

Well, what they're trying to do is provide better blinding. Doing proper blind studies of ketamine is quite hard because its subjective effects are far too noticable. That line just says people should do better at this in future to get more accurate results. It's not a statement about the ultimate form the treatment should take.

yes ofc, but if the treatment is the trip it will never work blinding it like this. If anything they should be looking for drugs that give comparable trips, with no potential for depression treatment.

I agree in principle, though having tried most of the various types of trippy substances, I've yet to encounter one that hasn't showed potential for a short term antidepressant effect. I guess I haven't tried those weird delta opioid ligands(salvia divonorum). I guess deliriants(like diphenhydramine) would have about zero antidepressant effect too, but that would have possible negative effects, even being liable to cause trauma.

I believe benzodiazepines have also been tried as an active placebo but I don't remember what the results were.

Re: Ketamine no better than placebo at alleviating depression, unusual trial finds

#26

> They gave volunteers ketamine while they were under general anesthesia, theoretically preventing the participants from going on a trip. Maybe it's the trip that helps.

As a relatively seasoned meditator, I am absolutely sure that this is the trip that helps, not the chemistry. One way to look at meditation (and, I hear, psychedelics) that fits my experience is that it has the potential effect of opening the range of "ways of looking", to change the way one builds the perceived world. What propulsed my meditation to a totally different level was to see it as a practice of actively e…

Indeed, I remember a while back there was a TikTok filter going around where it made old people look younger.

One of the people using it said it basically had cured her self-perception issues; she had been bullied for her looks as a child and internalized that she was ugly. But as an adult when she saw her younger face in the app, she realized immediately how the characterization of that face as ugly was just the perception of child bullies.

And it wasn't something that photographs could do for her -- it was the fact that it was her younger face superimposed on her current body, and that it was moving as she moved which gave her a new "way of looking" as you put it. In a sense, AI gave her a chemical-free trip.

Re: Ketamine no better than placebo at alleviating depression, unusual trial finds

#27

Unusual is an understatement. This just seems ill-conceived to me. You can't eliminate one effect on the brain by introducing other effects on the brain that might have their own consequences for the results. All this shows is that ketamine while under general anaesthesia is not more efficacious than placebo. Ok then. This just seems like a failed attempt to introduce better blinding to me. I'm not convinced it sheds…

Actually, what it shows is both that getting ketamine while under general anaesthesia is roughly as effective as when taken without anaesthesia (40% here vs 45% in [1]), and as effective as just taking anaesthesia (their placebo treatment).

[1]: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3992936/

Re: Ketamine no better than placebo at alleviating depression, unusual trial finds

#28
post #7

Earlier quoted context omitted.

Don't post lies and FUD here please.

If you're gonna accuse someone of posting lies and FUD, at least have some sort of reference [0] to point to, please. Otherwise you're just participating in a "uh-huh!", "nuh-uh!" pissing contest. [0] https://www.nature.com/articles/s41380-022-01661-0

There's a simple reference that doesn't even need to be quoted: SSRIs are approved for treating depression in all major countries on Earth. And this approval required they pass phase 3 clinical trials, demonstrating effectiveness over placebo.

Also, given that they are typically preferred over other classes of anti-depressants (try-cyclics etc), we also know they have demonstrated better effectiveness than other drugs.

Given all this, it is obviously up to the person flippantly contradicting well-established medical practice to provide citations, or rightfully be accused of spreading FUD.

Re: Ketamine no better than placebo at alleviating depression, unusual trial finds

#29
post #22

Earlier quoted context omitted.

And you object to them trying to find out if it does?

The problem is that their conclusion is not going to be read as “wow, it’s the trip that helps more than just the chemical.” Instead it’ll be read as “well I guess this chemical doesn’t work at all.” The notion that the trip is the therapeutic element seems oddly frightening or threatening to a lot of people. … Or at least it’s not what they’re looking for. The quest is for a pill that works deterministically without…

How is people misinterpreting the result that way a fair criticism of their work?

Re: Ketamine no better than placebo at alleviating depression, unusual trial finds

#30
I've been taking oral ketamine for about 2 years now. Not super frequently, probably ~6-10x/year. I feel like it's been a pretty helpful addition to my life, but it's not what I expected at all.

To me, ketamine isn't really "enjoyable" or seem to modify my mood directly or anything like that. What it does do is shift my perspective for a few minutes and makes me introspective in ways I can only see as healthy.

Sometimes I think about my wife, my children, my finances, my work, my parents, cleaning the bathroom, whatever life issues I might be struggling with at that moment but the perspective shift brings a clarity to the issue and the solution seems obvious. I often want to jump off the couch and feel invigorated and motivated. (Of course ketamine also makes you fatigued so it's a bit of a strange mix of feelings). I mentally want to do things but physically I am not able to—that's fine though.

I'm also an experienced meditator and have done traditional psychedelics, neither of those have improved my life as much as ketamine has. Meditation is simply really hard for me despite over a decade of trying and failing to make it a daily habit. Psychedelics work very well for introspection, but they're also terrifying and in my mid-30's I am pretty sure this is something I'm content with not needing to deal with again.

I once heard someone say that psychedelics are like color TV and ketamine is black-and-white. Somehow this describes the feeling exactly to me. Ketamine isn't nearly as intense as LSD/psilocybin and that's the best part IMO.

My life is in relatively good shape, but a monthly-ish tune-up with ketamine seems to have really been effective.

Post reply on HN