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Placebo and nocebo effects in randomized controlled trials: the implications for research and practice
Christine Sanderson1, Janet Hardy, Odette Spruyt
1Calvary Health Care Sydney, Kogarah, New South Wales, Australia; CareSearch, Flinders University, Bedford Park, South Australia, Australia.
Journal of Pain and Symptom Management
|March 26, 2013
Summary
A study found ketamine offered no pain relief benefit over placebo for cancer pain. High placebo and nocebo responses highlight the importance of the therapeutic relationship in pain management.
Area of Science:
- Pain Management
- Clinical Trial Methodology
- Palliative Care
Background:
- Placebo and nocebo effects significantly influence symptom control, including analgesia.
- Clinical trials use placebo controls to quantify these non-pharmacologic responses.
- Understanding these effects is crucial for interpreting trial results and clinical practice.
Purpose of the Study:
- To analyze a placebo-controlled trial of ketamine for cancer pain.
- To discuss the methodological implications of high placebo and nocebo responses.
- To explore the clinical and ethical considerations in palliative pain management.
Main Methods:
- Randomized, double-blind, placebo-controlled trial design.
- Analysis of ketamine's efficacy against placebo in cancer pain.
- Methodological discussion of placebo and nocebo effects in clinical trials.
Main Results:
- Ketamine demonstrated no net clinical benefit over placebo for cancer pain.
- High rates of both placebo and nocebo responses were observed.
- The study underscores the significance of non-pharmacologic factors in pain management.
Conclusions:
- The therapeutic relationship and context of care are paramount in pain management.
- Clinicians must recognize the strength of placebo and nocebo responses in practice.
- Further research into the biopsychosocial aspects of pain response is warranted.
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