Do Antidepressants Work?found in the peer-reviewed literature. The problem is that this has been a prime example of publication bias: Positive studies are likely to be released, with negative ones
The most comprehensive study on them has recently been published, showing mostly modest effects.
http://tinyurl.com/y9vo32tl
By Aaron E. Carroll
March 12, 2018
Antidepressants are widely used, but there are still so many unanswered questions about them.
More people in the United States are on antidepressants, as a percentage of the population, than any other country in the world. And yet the drugs’ efficacy has been hotly debated.
Some believe that the short-term benefits are much more modest than widely thought, and that harms may outweigh benefits in the long run. Others believe that they work, and that they can be life-changing.
Settling this debate has been much harder than you might think.
It’s not that we lack research. Many, many studies of antidepressants can be
In 2008, a group of researchers made this point by doing a meta-analysis of antidepressant trials that were registered with the Food and Drug Administration as evidence in support of approvals for marketing or changes in labeling. Companies had tosubmit the results of registered trials to the F.D.A. regardless of the result. These trials also tend to have less data massaging — such as the cherry-picking of outcomes — than might be possible in journals.
The researchers found 74 studies, with more than 12,500 patients, for drugs approved between 1987 and 2004. About half of these trials had “positive” results, in that the antidepressant performed better than a placebo; the other half were “negative.” But if you looked only in the published literature, you’d get a
A second meta-analysis published that year also used F.D.A. data instead of the peer-reviewed literature, but asked a different question. Researchers wondered if the effectiveness of a study was related to the baseline levels of depression of itsparticipants. The results suggested yes. The effectiveness of antidepressants was
The take-home message from these two studies was that the effectiveness of antidepressants had been overstated, and that the benefit might be limited to far fewer patients than were actually using the drugs.studies, biased
These points, and more, were made in a paper written by John Ioannidis in the journal Philosophy, Ethics, and Humanities in Medicine in 2008. He argued that the study designs and populations selected, especially the short length of many
This paper — “Effectiveness of Antidepressants: An Evidence Myth Constructed From a Thousand Randomized Trials?” — sowed lingering doubts about the use of antidepressants and the conduct of medical research. But recently, the most comprehensiveantidepressants study to date was published, and it appears to be a thorough effort to
Researchers, including Dr. Ioannidis this time, searched the medical literature, regulatory agency websites and international registers for both published and unpublished double-blind randomized controlled trials, all the way till the beginning of 2016.“network meta-analysis technique,” which allows multiple treatments to be compared both within
They looked for both placebo-controlled and head-to-head trials of 21 antidepressants used to treat adults for major depressive disorder. They used a
They found 522 trials that included more than 116,000 participants. Of those, 86 were unpublished studies found on trial registries and company websites. An additional 15 were discovered through personal communication or by hand-searching reviewarticles. The authors went an extra step and asked for unpublished data on the studies
The reassuring news is that all of the antidepressants were more effective than placebos. They varied modestly in terms of efficacy and acceptability, so each patient and doctor should discuss potential benefits and harms of individual drugs.may not have had enough data on non-industry trials to accurately determine if a
Further good news is that smaller trials did not have substantially different results from larger trials.
It also did not appear that industry sponsoring of trials correlated with significant differences in response or dropout rates. But — and this is a big “but” — the vast majority of trials are funded by industry. As a result, this meta-analysis
There were also signs of “novelty” bias: Antidepressants seemed to performbetter when they were newly released in the market but seemed to lose efficacy and acceptability in later years.
The bad news is that even though there were statistically significant differences, the effect sizes were still mostly modest. The benefits also applied only to people who were suffering from major depression, specifically in the short term. In otherwords, this study provides evidence that when people are found to have acute major
Because we lack good data, we still do not know how well antidepressants work for those with milder symptoms that fall short of major depression, especially if patients have been on the drugs for months or even years. Many people probably fall into thatcategory, yet are still regularly prescribed antidepressants for extended periods. We don’t know how much of the benefit received from such use is a placebo effect versus a biological one.
I asked Dr. Ioannidis if the results of this new study were as radical as manynews articles had suggested. He confirmed that this was a much-larger meta-analysis — with about 10 times more information — than the ones from a
But he thought that some of the exuberance in the news media might be a littleoverblown. “I am afraid that some news stories gave very crude interpretations that may be misleading, especially when their titles were too absolute, like ‘the drugs
Even with so much research on antidepressants, there are still many unansweredquestions. It’s unclear if drug companies would be interested in the results,
***
I've been concerned with this issue most of my life, not because I take >antidepressants but because many of the people I've cared for did.
And I've been skeptical of the benefits since I was about 12 years old.
This debate is far from over. Not with:
"the vast majority of trials are funded by industry"
and...
"There were also signs of “novelty” bias"
and... most importantly,
"even though there were statistically significant differences,
***the effect sizes were still mostly modest***."
and...
“The clinical (as opposed to statistical) significance of the
treatment effects that we detected will continue to be contested"
and...
"we still do not know how well antidepressants work for those
with milder symptoms that fall short of major depression, especially
if patients have been on the drugs for months or even years.
Many people probably fall into that category, yet are still
regularly prescribed antidepressants for extended periods.
We don’t know how much of the benefit received from such use
is a placebo effect versus a biological one."
and...
"there are still many unanswered questions"
and yet...
"no regulatory agency is requiring more data"
Doctors and companies have been pushing these psych meds relentlessly
for decades. I remain skeptical even after this large study which
indicates that while such meds may help many, the effect is... modest.
It's a barely adequate "solution" to human mental health.
That's what I've always thought; and I still think so.
I have pet peeves of my own regarding people on psych meds.
One: many of them are sedentary. You need exercise!
Regular exercise can make a big difference physically and mentally.
Two: many eat an unhealthy diet. Eat nutritious food regularly.
Eating junky all the time has bad effects physically and mentally.
Three: regularly experience the beauty of the natural world.
Sitting inside forever twiddling electronic devices can make
everything start to seem unreal.
Four: learn how to quiet your thoughts. (And how to question
your thoughts, skeptically.) If your thoughts start running away
in weird directions, quiet your mind. Then go for a long walk
and open your eyes. :)
I think that if most people just make sure to do all four of those
simple things first they probably won't ever need pysch meds.
There may be people this 'prescription' doesn't work for -
but I almost never see people truly try it.
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