The Strange Powers of the Placebo Effect

Posted by Miss Cellania in Health, Video Clips on March 7, 2011 at 7:50 am


(YouTube link)

You know that placebos can relieve pain, but did you know you can suffer withdrawal symptoms after taking them? This video from Professor Funk has a lot more about placebos and how they work. -via Nag on the Lake

 
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Alcohol Placebos Can Impair Memory

Posted by Alex in Food & Drink, Health on January 20, 2011 at 12:17 pm

It’s common knowledge that drinking alcohol can impair your memory but what about simply suggesting that you’ve drunk alcohol?

Turns out, alcohol placebos can also impair your memory and judgment:

Subjects drank plain tonic water, but half were told it was a vodka and tonic; then all subjects took part in an eyewitness memory experiment.

Subjects who were told they drank alcohol were more swayed by misleading postevent information than were those who were told they drank tonic water, and were also more confident about the accuracy of their responses.

Our results show that the mere suggestion of alcohol consumption may make subjects more susceptible to misleading information and inappropriately confident. These results also provide additional confirmation that eyewitness memory is influenced by both nonsocial and social factors.

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Placebos Can Work Even Without Deception

Posted by Alex in Health on January 3, 2011 at 1:16 am

Placebos work because people who take it believe that they’re actually medicine, right? I mean, that’s the basic tenet of every modern medical studies, which use placebos as controls.

But can placebos work without any deception? Here’s an intriguing study from Harvard Medical School that discovered the surprising healing power of sugar pills:

"Not only did we make it absolutely clear that these pills had no active ingredient and were made from inert substances, but we actually had ‘placebo’ printed on the bottle," says Kaptchuk. "We told the patients that they didn’t have to even believe in the placebo effect. Just take the pills."

For a three-week period, the patients were monitored. By the end of the trial, nearly twice as many patients treated with the placebo reported adequate symptom relief as compared to the control group (59 percent vs. 35 percent). Also, on other outcome measures, patients taking the placebo doubled their rates of improvement to a degree roughly equivalent to the effects of the most powerful IBS medications.

"I didn’t think it would work," says senior author Anthony Lembo, HMS associate professor of medicine at BIDMC and an expert on IBS. "I felt awkward asking patients to literally take a placebo. But to my surprise, it seemed to work for many of them."

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The Need for Double-Strength Placebos

Posted by Miss Cellania in Improbable Research on December 7, 2010 at 6:15 am

by Frederic N. Firestone, Ph.D., J.D.
Virginia Beach, Virginia

[EDITOR'S NOTE: On May 24, 2001, two years after this article was published, a research report and accompanying editorial in the New England Journal of Medicine claimed that the placebo effect does not exist. Clearly, the New England Journal authors did not read Frederic Firestone's classic report on double-strength placebos.]

Too often, good research about new medicines—research that shows unusually clear-cut results—goes unpublished, and thus unseen. The reason? Journal editors distrust any study in which the placebo effect is “too small.” The problem has a simple solution: re-run the experiment, but instead of giving standard placebos to the control group, instead give them double-strength placebos (DSPs).

(Image credit: Flicker user foxgrrl)

What is the Placebo Effect?

The placebo effect is the response that a so-called “control group” of patients shows when those patients are treated with placebos—innocuous “pretend” medicine—rather than with real medicine.

Prior Research on Placebos

Scientists have studied a wide variety of placebo issues, and published reports about what they found.[1,2,3,4,5,6,7,8] Yet prior to this investigation, no one has published a report on the problem of minimal placebo response.

The Need to Study Double-Strength Placebos

While certain problems are associated with the use of the double-strength placebo, overall it offers promises to be a powerful research tool.

Approval of the DSP by the US Food and Drug Administration (FDA) must of course precede its use. Since its efficacy must be demonstrated in a proper study, the immediate problem is the choice of a placebo to give the control group of that study. There is no documentation of the dif-fering strengths of the placebos that are currently available, so it would be appropriate to first determine these strengths, and then select a control placebo that has median effect.

Patient Sensitivity and Safety

There is a more serious problem in studying the efficacy of double-strength placebos. As with any new drug, we must confront the possibility of deleterious effects upon individuals who may exhibit a high level of sensitivity to placebos.[8] Most important, of course, is to find a safe, practical way to identify patients who are acutely allergic to placebos. The public will to tolerate a rash of placebo deaths, nor should it have to.

The expense of safety-testing the placebos can be mitigated by a research setting suggested here.

Special Observation Facility

The subjects of the double-strength placebo study should have the DSPs administered in a specially prepared room, one equipped not with the traditional “one-way mirror,” but instead with a large, clear glass window. This is a necessity, because any subjects who noticed a large mirrored opening in a wall would understand that they were being observed, and that might lead to skewed results.

The large glass window should have an ordinary venetian blind on the observers’ side of the glass, with the slats arranged at an angle permitting optimal light transmission. On the other side of the glass, there should be a blind of vertical slats, of the type commonly used on sliding glass patio doors, with the slats arranged at a suitable angle. For the subjects, this provides a reassuringly familiar home-like setting. The main advantage of this arrangement, though, is that with minimal effort and expense, it ensures a double-blind experiment.

(Image credit: Flickr user Jake Bouma)

FDA Approval

When the study results are submitted to the Food and Drug Administration, it is essential to emphasize that approval of double-strength placebos will be of value only if no required warning label is required. The reason for this is simple. Even a statement worded in the most approving way (e.g., “The Surgeon General has determined that this placebo is harmless despite its potency”) may limit the usefulness of the product.

Technical Note

The molecular structure of the DSP being a merely technical matter, it is beneath the scope of this article.

(Image credit: Flickr user Rodrigo Senna)

References

1. “Placebos: relative merits of H2O and H2SO4,” A. Amoamasamat, Journal of Patheohomic Medicine, vol. 2, 1989, pp. 6-14.

2. “Polished gravel as a placebo: some technical problems,” A. Amoamasamat, Western Medical Repository, vol. 8, 1990, pp. 46-47.

3. “Why diabetics react strangely to many placebos,” A. Amoamasamat, Molasses and Sugar Quarterly, vol. 23, 1991, pp. 56-60.

4. “LSD: a reason to avoid its use as a placebo,” A. Amoamasamat, Cactus Times, vol. 1, pp. 1-84.

5. “When the placebo suppository is more effective than the therapeutic agent: a suggestion to practitioners,” A. Amoamasamat, Tips for Managed Care, vol. 3, 1993, pp. 8-9.

6. “Patients who are displeased by placebos: a terminological mystery,” A. Amoamasamat, Journal of Medical Linguistics, vol. 88, 1994, pp. 5-22.

7. “Forged prescriptions for placebos: a crime with mitigating circumstances? in A. Miss, ed., The Wrong is Ended But the Felony Lingers On, A. Amoamasamat, New York, Paris, and Casablanca: Who’s Publishing, 1996.

8. “Overly sensitive users of placebos: a statistical analysis of post-mortem examinations,” A. Amoamasamat, unpublished, 1997. Was available from the author prior to his recent replication of the study. The author’s widow does not respond to requests for copies.

Notes

i. The author completed this article at the fishing facility of Virginia Beach, where it was immediately subjected to pier review.

ii. The problems involved in using two-way mirrors, three-way mirrors, etc., will be addressed in a separate publication, as will the problems related to using zero-way mirrors.

© Copyright 1999, 2001 Annals of Improbable Research (AIR)

_____________________

This article is republished with permission from the March-April 1999 issue of the Annals of Improbable Research. You can download or purchase back issues of the magazine, or subscribe to receive future issues. Or get a subscription for someone as a gift!

Visit their website for more research that makes people LAUGH and then THINK.

 
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Placebo Effect Caught on MRI

Posted by John Farrier in Health on October 16, 2009 at 8:15 pm

Not only is the placebo effect becoming stronger, but it’s now been imaged for the first time by researchers with fMRI machines. Falk Eippert at the University Medical Centre Hamburg-Eppendorf in Germany led the study:

Later, with an fMRI scanner on, the researchers rubbed “control” and “painkiller” creams onto two different spots on each volunteer’s left forearm and applied the same level of heat to each spot, 15 times.

The fake “painkiller” cream worked: volunteers said they experienced 26 per cent less pain on the “painkiller”-treated patch of their arm, compared with the “control”-treated area.

Meanwhile, the fMRI scanner witnessed the placebo effect. When skin treated with the “control” cream was heated, an area of the dorsal horn located on the left side of volunteers’ lower necks lit up, suggesting increased neural activity there in response to pain. However, this signal disappeared in the “painkiller” trials.

Link via Popular Science | Image: U.S. Department of Health and Human Services

 
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Placebos Are Becoming More Effective

Posted by Miss Cellania in Health on August 25, 2009 at 10:22 am

The percentage of new pharmaceutical products that fail their effectiveness trials is growing. The culprit is the placebo effect, which appears to be stronger than in years past. If a drug cannot provide relief significantly better than a sugar pill, it won’t go on the market.

The upshot is fewer new medicines available to ailing patients and more financial woes for the beleaguered pharmaceutical industry. Last November, a new type of gene therapy for Parkinson’s disease, championed by the Michael J. Fox Foundation, was abruptly withdrawn from Phase II trials after unexpectedly tanking against placebo. A stem-cell startup called Osiris Therapeutics got a drubbing on Wall Street in March, when it suspended trials of its pill for Crohn’s disease, an intestinal ailment, citing an “unusually high” response to placebo. Two days later, Eli Lilly broke off testing of a much-touted new drug for schizophrenia when volunteers showed double the expected level of placebo response.

It’s not only trials of new drugs that are crossing the futility boundary. Some products that have been on the market for decades, like Prozac, are faltering in more recent follow-up tests.

Wired takes a look at how the placebo effect works, and the various reasons newer drugs don’t compete as well with the mind’s ability to affect our bodies. Link -via Boing Boing

Previously at Neatorama: Prozac: No Better Than Placebo?

 
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The Power of Placebo

Posted by Miss Cellania in Health on March 10, 2009 at 10:44 am

Placebos are medicines or procedures that don’t have any active medical ingredients. Their effects are all in your mind, but the brain has wonderful ways of making us feel better. eMedExpert Blog looks at the latest research on the placebo effect. Did you know there’s such a thing as placebo surgery?

In the 1950s, many physicians treated angina with ligation of the internal mammary artery. Despite claims of up to a 91% success rate, in the late 1950s, two skeptics conducted separate double-blind tests in which half the patients received skin incision, but not artery ligation12-13. In both studies, the placebo surgery proved equally effective as the ligation. And the overall rate of improvement with the placebo was 37%.

A 2002 study of arthroscopic knee surgery found that the outcomes for a placebo procedure were as good as those of the “real” surgery14.

Link -Thanks, Karen!

(image credit: Flickr user Akácio S. [ /photographyk ])

 
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