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No evidence cannabis helps anxiety, depression, or PTSD

https://www.sciencedaily.com/releases/2026/03/260319044656.htm
58•nothrowaways•1h ago

Comments

int32_64•1h ago
It's good to see science confirm what anybody who has accidentally taken too large of edibles dose understands.
embedding-shape•59m ago
Huh? Like Paracetamol doesn't work because if you take too much you die? Are you confusing "overdosing" with something else here maybe?
entropie•57m ago
Ive overdosed edibles multiple times and I dont know what you talk about.
billfor•49m ago
Well how do you know if you overdosed? What else happens besides anxiety and paranoia? Some of the reaction may be genetic, but I think many people have a negative reaction to taking mass quantities of cannabis. I don't know if you want to take a poll here but it's pretty common...
erelong•57m ago
Still ok with it being legal but yeah that doesn't mean it's beneficial
lokar•30m ago
Yep. Of course alcohol is depressive.
LPisGood•12m ago
“Depressant” refers to its impacts on nervous system activity, not that it causes feelings of depression.
jrecursive•55m ago
But it sudo get you high
MagicMoonlight•51m ago
Obviously. It was always just a scam so that people could do drugs.

Anyone who knows a weed addict knows that they end up anxious and stupid. It actually seems to reduce their IQ while they’re using it regularly.

post-it•38m ago
How does your "anyone knows" control for false negatives? i.e. how can you be certain that the people you met who aren't "anxious and stupid" aren't also weed addicts?
lokar•27m ago
What's wrong with people choosing to do drugs if it has no major adverse effects on other people?
bitxbitxbitcoin•51m ago
The studies cited by this metastudy all suffer from the same issue: They aren't studying the cannabis plant at all and even if they are, it's not in the chemovars (chemical makeups) that real consumers are actually consuming - due to cannabis sourcing issues stemming from cannabis's continued illegality.

For randomized controlled trials, even in "legal" states, university scientists can't just walk into a dispensary and buy cannabis to then administer to test subjects.

That's Post-Prohibition for you.

As far as I can tell, all of the studies utilize isolates - and not necessarily in conjunction.

For instance, none of the 6 anxiety studies included in this metastudy used THC and CBD together.

The headline could read instead: No evidence cannabinoid isolates help anxiety, depression, or PTSD.

Cannabis advocates are the first to mention the entourage effect. Cannabis prohibitionists on the other hand, love nothing more than to cite incomplete science.

Aurornis•38m ago
Using quantified isolates is the correct way to do a controlled study. Dosing is important.

Claims that you need a special combination of exactly the right strains are just a way to move the goalposts forever. They could study 10 different strains in controlled trials and the same people would show up to dismiss this study because they weren't using some random strain that has some perfect combination of entourage effect.

Using actual plants and smoking would also introduce another major variable, with further claims that the strains they were giving patients were too weak or they were smoking it wrong.

EDIT: I don't have time to read every single citation included, but the claim above that they were all THC or CBD isolates does not appear correct. One randomly selected citation:

> The short-term impact of 3 smoked cannabis preparations versus placebo on PTSD symptoms: a randomized cross-over clinical trial

So the claim above that they didn't investigate smoked cannabis or "entourage effect" is false.

lokar•28m ago
I think that's a bit of a straw man.

You could study one combination that is broadly representative and is much much closer than the isolate.

Aurornis•6m ago
They included studies which looked at multiple different smoked cannabis varieties.

The claim above about only looking at isolates was false.

tannedNerd•26m ago
Way to completely misunderstand and try in an underhanded way to the dismiss entourage effect.

It’s not smoking 10 strains in a row it’s the fact that you need CBD THC and all the terpenes to get the effects. So the current growing trend of just getting the THC number higher tends to result in plants that don’t actually give people the full spectrum of effects, beneficial or not.

So the correct way to do this would be a full spectrum isolate, which again you coincidently forgot to mention I’m sure.

Aurornis•14m ago
> It’s not smoking 10 strains in a row

I never said it was. I was saying you could run 10 different studies on 10 different strains with 10 different "entourage effect" profiles and even if all of them were negative, they would be dismissed as not having precisely the right entourage effect.

If there are anti-depressant compounds in cannabis plants then they can be extracted and isolated, too.

> So the correct way to do this would be a full spectrum isolate, which again you coincidently forgot to mention I’m sure.

Of course, the correct formulation is something other than what was tested, right? And if they tested a full spectrum isolate with negative results, we should assume that it just wasn't the right blend of terpenes and therefore that study should be dismissed too? Repeat ad nauseum?

pipeline_peak•36m ago
>The headline could read instead: No evidence cannabinoid isolates help anxiety, depression, or PTSD.

There’s no evidence that what they tested with was pure THC isolates. If they’re using cannabis in plant form, even if it was bred for higher thc content, there is still cbd.

bitxbitxbitcoin•4m ago
Those that are interested to click through and see the studies cited by this metastudy and whether they used whole plant cannabis extracts, cannabis isolates, or even non cannabis derived isolates.

tldr; "If they're using cannabis in plant form" is a very, very high bar for the current state of cannabis (really cannabinoid) research.

post-it•36m ago
Yeah, I noticed this too. Canadian universities have been studying cannabis use using actual cannabis, so I'm not sure why this metastudy considered anything else. "We need to publish something" perhaps.
sublinear•49m ago
If anything, I think most people discover anxiety with cannabis.

It's a shame that first experiences with stress also coincide with that phase of life, so the debate never ends.

Aurornis•40m ago
This is a hard topic to communicate in depression treatment. It's easy to mistake substances that temporarily boost your mood or calm your nerves for effective treatments for an underlying condition.

There was a brief period of time before the opioid prescribing backlash when some fringe psychiatrists were proposing weaker opioids as adjunctive treatments for treatment resistant depression. It's hard to fathom now, but opioids were more casually prescribed a few decades ago. I recall some discussion where one of them said they were seeing good initial results but the effects faded, and then it was hard to get the patients off of the opioids when they were no longer helping. Not surprising to anyone now, but remember there was a period of time where many seemingly forgot about their addictive properties.

I feel like I've seen a weaker version of this in some friends who turned to THC to "treat" their depression: Initial mood boost, followed by dependency, then eventually into a protracted period where they know it's not helping but they don't want to stop because they feel worse when they discontinue. This wasn't helped by the decades of claims that claimed THC was basically free of dependency problems.

wahern•29m ago
> but remember there was a period of time where many seemingly forgot about their addictive properties.

There was also quite alot of talk about how doctors, by being reticent to prescribe opioids, were inhumanely forcing patients to live in pain, and not being sufficiently deferential to patient autonomy. Moreover, the rhetoric was incorporated into discussions about racist disparities in treatment, given there was some evidence doctors were less likely to prescribe opioids to black patients, suggesting doctors were systematically being cruel. Naturally, the easiest way to dodge those accusations was to simply prescribe opioids as a matter of course. Even in the absence of Purdue Pharma pushing their claims about lack of significant addictive potential, there was already quite alot of pressure to discount the risk of addiction.

andoando•28m ago
This point of view makes no sense to me.

If you take it and you feel your anxiety is lessened, that's the greatest proof you can ask for. All the psychiatric studies are already based on self assessment.

Second, a lot of psychatric treatments are temporary, ending whenever the medication is stopped or wears off so I dont see how this would be any different

Aurornis•19m ago
> If you take it and you feel your anxiety is lessened, that's the greatest proof you can ask for.

This mistake has been made many time throughout history. Cocaine was originally believed to be a viable treatment for depression. Opioids and amphetamines too.

Many drugs will make you feel good temporarily by blocking certain feelings or tricking your brain into feeling good. This is not the same as treating a condition.

You can think of actual treatments as working closer to the source to reduce the problem, not temporarily overriding it with a powerful drug-induced sensation.

noosphr•4m ago
Alcohol too.

It's not a cure. It's a high.

phainopepla2•19m ago
Duration of effect matters when it comes to successful treatments.

If we take your position and apply reductio ad absurdum, we could say that cocaine is a highly effective treatment for anxiety, although of course we know that in the not-so-long run it has the opposite effect.

olyjohn•14m ago
[delayed]
mihaaly•39m ago
But it can cause memory loss, impaired motor coordination, and food craving. Also memory loss.
wizardforhire•38m ago
My initial take from reading the headline was: no shit this is what mdma is for…

Tangentially, The etymology nerd in me has been taunted by the current article thats been on the front page for the as of now last 19 hours[1] which conveniently has the origin of the term linked to in the first sentence! [2]… which @suprisetalk also links to in the article description!…

So now I’m wondering why mdma has got the street name molly… and if they're not perhaps related?

As in molly (aka mdma) has got the name as its used as a guard against these ailments specifically…

[1] https://unsung.aresluna.org/molly-guard-in-reverse/

[2] https://en.wiktionary.org/wiki/molly-guard

monster_truck•34m ago
Isn't the lancet the same journal that has published the vax-autism and hydroxychloroquine studies?
Aurornis•31m ago
The Lancet has been around for 200 years. It publishes weekly.

It's a highly regarded journal, but it doesn't mean 100% of the papers published are perfect.

If you're trying to dismiss a study because it was published in The Lancet then that's not a convincing line of reasoning to anyone who understands the scientific publishing landscape.

foolfoolz•26m ago
same lancet that tried to bury covid lab leak theories in february 2020
zarathustreal•10m ago
These dismissals based on the source rather than the material are getting really annoying. We’re supposed to be intellectuals here, we can do better than that.
haghding•25m ago
me n my quarter brick beg to disagree
odinthedog•23m ago
Matthew Hill offers a great interview on Andrew Huberman's podcast - https://open.spotify.com/episode/26PR93gyNcs8YPlQ9dypW3?si=V...

As someone who's used cannabis regularly for over a decade, I tried to start to explain in this body my experience but every sentence written ends with me deciding, "that's too circumstantial to my lifestyle-physiology to include."

I think at the end of the day, empirical research's purpose is to get us closer to being able to just make our own decisions surrounding mind-altering drugs. Beyond that, cannabis affects a great deal of systems in our body concurrent to the rest of our environment's effects. Use your autonomy to determine if it's a positive or a negative for you. Don't drive fucked up, please.

tannedNerd•18m ago
This is the most reasonable take I’ve seen in this whole thread. Alcohol doesn’t reduce anxiety either yet tons of people take it as a social lubricant and it probably does more damage to those consuming it than those who consume weed. So shrug? Just be responsible folks and let people blow off steam how they like without judging it like weed is an 8 ball.

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