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What is a Placebo?
Mar 29, 2018

Tracy Campbell
Core Spirit member since Dec 24, 2020
Reading time less than 1 minute

A placebo is an inactive, look-alike, or fake treatment that does not contain an active substance meant to affect health, but when administered to a person under the pretext of being a treatment, may improve a person’s condition simply because he or she expects that it will help.

Usually resembling a regular treatment or medicine, placebos could be pills, tablets, or capsules that look like a medication but are composed of sugar, starch, saline or other inactive substances, or it could be a shot, a liquid, a procedure, or even a visit to the doctor.

Any change in symptoms that is measured, observed, or felt after the placebo is given is called the placebo effect or the placebo response. Symptoms may improve, or a person may experience what appears to be side effects. A placebo can produce physiological effects such as changes in blood pressure, heart rate, and brain activity.

The placebo effect is thought to occur more strongly in certain health conditions such as pain, depression, anxiety, osteoarthritis, Parkinson’s disease, headache, hot flashes, cold symptoms such as cough, and skin itchiness.

How Are Placebos Used in Research?

In clinical trials, a placebo may be compared to a new treatment to see if any effects that happen with the new treatment are actually caused by the treatment and not something else (such as expectations about the treatment).

In a double-blind placebo-controlled study, the placebo must be convincing enough that the patient and the person administering the treatment do not know who is receiving the treatment and who is getting the placebo, so that their expectations don’t influence the outcomes.

Participants in a clinical trial using a placebo must always be informed about the possibility that they could be receiving a placebo.

Placebos in Complementary and Alternative Medicine

The placebo effect is often used when discussing why people report improvements with complementary and alternative medicine (CAM).

Critics often point to the lack of scientific evidence (specifically randomized controlled trials) demonstrating that CAM therapies, such as acupuncture, are more effective than a placebo. The growing field of CAM research should include randomized controlled trials to help distinguish between a therapeutic effect and a placebo effect.

by Cathy Wong For Very Well

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