Featured Research

from universities, journals, and other organizations

Placebo effects of different therapies not identical

Date:
July 31, 2013
Source:
Public Library of Science
Summary:
Not all placebos are equal, and patients who respond to one placebo don't always respond to others, according to new research.

Not all placebos are equal, and patients who respond to one placebo don't always respond to others, according to research published July 31 in the open access journal PLOS ONE by Jian Kong from Massachusetts General Hospital, Harvard Medical School and colleagues from other institutions.

Related Articles


The researchers tested the analgesic effects of genuine acupuncture, sham acupuncture and a placebo pill on healthy participants' pain sensitivity. Participants were not told what treatment they were receiving, but were informed that the pill was Tylenol, a well-known painkiller and different schools of acupuncture: electroacupuncture and manual acupuncture (sham acupuncture). A control group received no treatment at all. Shortly before and after each treatment, a warm electrode was placed on participants' forearms and the temperature gradually increased. They were asked to indicate when the heat first became painful and when it became too hot to tolerate to identify pain thresholds and tolerance.

No significant associations were found between participants' responses to the different treatments, suggesting that none of these individuals could be identified as placebo 'responders' or 'non-responders'. However, participants' expectations that the treatment would help relieve pain correlated with their pain thresholds and tolerance.

According to the authors, these and other parameters in their study suggest that responses to a placebo depend on diverse factors including the route of administration (pills or acupuncture), environmental cues, and learning based on verbal suggestions or conditioning. Kong adds, "It implies that placebo responses may not be dependent on stable individual traits but rather are more a characteristic of the circumstances of individuals or a combination of both trait and state."

In addition, they also found subjects' responses to sham acupuncture correlated significantly with their response to genuine acupuncture. This suggest that people who responded to genuine acupuncture were significantly more likely to experience pain relief from sham acupuncture, but the authors clarify that this does not indicate the two are the same. Instead, they suggest that acupuncture may have non-specific pain-relieving effects that may contribute to this observation.


Story Source:

The above story is based on materials provided by Public Library of Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Jian Kong, Rosa Spaeth, Amanda Cook, Irving Kirsch, Brian Claggett, Mark Vangel, Randy L. Gollub, Jordan W. Smoller, Ted J. Kaptchuk. Are All Placebo Effects Equal? Placebo Pills, Sham Acupuncture, Cue Conditioning and Their Association. PLoS ONE, 2013; 8 (7): e67485 DOI: 10.1371/journal.pone.0067485

Cite This Page:

Public Library of Science. "Placebo effects of different therapies not identical." ScienceDaily. ScienceDaily, 31 July 2013. <www.sciencedaily.com/releases/2013/07/130731230123.htm>.
Public Library of Science. (2013, July 31). Placebo effects of different therapies not identical. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/2013/07/130731230123.htm
Public Library of Science. "Placebo effects of different therapies not identical." ScienceDaily. www.sciencedaily.com/releases/2013/07/130731230123.htm (accessed December 20, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Saturday, December 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

The Best Tips to Curb Holiday Carbs

The Best Tips to Curb Holiday Carbs

Buzz60 (Dec. 19, 2014) It's hard to resist those delicious but fattening carbs we all crave during the winter months, but there are some ways to stay satisfied without consuming the extra calories. Vanessa Freeman (@VanessaFreeTV) has the details. Video provided by Buzz60
Powered by NewsLook.com
Sierra Leone Bikers Spread the Message to Fight Ebola

Sierra Leone Bikers Spread the Message to Fight Ebola

AFP (Dec. 19, 2014) More than 100 motorcyclists hit the road to spread awareness messages about Ebola. Nearly 7,000 people have now died from the virus, almost all of them in west Africa, according to the World Health Organization. Video provided by AFP
Powered by NewsLook.com
Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Buzz60 (Dec. 19, 2014) A double-amputee makes history by becoming the first person to wear and operate two prosthetic arms using only his mind. Jen Markham has the story. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins