Evidence map›Paper›PMID 23023032›Full record

ReviewPharmacological reviews2012

Unravelling the mystery of capsaicin: a tool to understand and treat pain.

Jessica O'Neill, Christina Brock, Anne Estrup Olesen, Trine Andresen, Matias Nilsson, Anthony H Dickenson

Open access · bronzeAbstract readReview
In one paragraph

Review in Pharmacological reviews, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 139 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
139citing papers in PubMed, 4 pooled it
9.6field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

139 citing papers in PubMed, 4 syntheses or guidelines pooled it, 340 citations in OpenAlex.

  1. Effects of acute Capsaicin analogue intake on athletic performance: a three-level meta-analysis.Journal of the International Society of Sports Nutrition · 2026
    Pooled it
  2. A Systematic Review of the Effects of Capsaicin on Alzheimer's Disease.International journal of molecular sciences · 2023
    Pooled it
  3. Pooled it
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  12. Journal of Zhejiang University. Science. B · 2026
    Review
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79 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 2 countries.

Jessica O'NeillNeuroscience, Physiology and Pharmacology, University College London, London. jessica.oneill@ucl.ac.uk
Christina Brock
Anne Estrup Olesen
Trine Andresen
Matias Nilsson
Anthony H Dickenson
Aarhus University · DKUniversity College London · GBAalborg University · DKMech-Sense · DK

Funding

Wellcome Trust
6 · The paper itself

Abstract

A large number of pharmacological studies have used capsaicin as a tool to activate many physiological systems, with an emphasis on pain research but also including functions such as the cardiovascular system, the respiratory system, and the urinary tract. Understanding the actions of capsaicin led to the discovery its receptor, transient receptor potential (TRP) vanilloid subfamily member 1 (TRPV1), part of the superfamily of TRP receptors, sensing external events. This receptor is found on key fine sensory afferents, and so the use of capsaicin to selectively activate pain afferents has been exploited in animal studies, human psychophysics, and imaging studies. Its effects depend on the dose and route of administration and may include sensitization, desensitization, withdrawal of afferent nerve terminals, or even overt death of afferent fibers. The ability of capsaicin to generate central hypersensitivity has been valuable in understanding the consequences and mechanisms behind enhanced central processing of pain. In addition, capsaicin has been used as a therapeutic agent when applied topically, and antagonists of the TRPV1 receptor have been developed. Overall, the numerous uses for capsaicin are clear; hence, the rationale of this review is to bring together and discuss the different types of studies that exploit these actions to shed light upon capsaicin working both as a tool to understand pain but also as a treatment for chronic pain. This review will discuss the various actions of capsaicin and how it lends itself to these different purposes.

Indexed as

AnimalsCapsaicinGastrointestinal TractHumansModels, BiologicalPainRespiratory SystemSkinTransient Receptor Potential ChannelsCapsaicinTransient Receptor Potential Channels

Identifiers

PMID23023032
PMCPMC3462993
OpenAlexW2161755886

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.