ReviewCureus2026
Placebo Effects in Modern Medicine: Mechanisms, Clinical Evidence, Limitations, and Future Directions.
Review in Cureus, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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.
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.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
This narrative review traces the historical background of placebo use in medicine, from its early role as a consolatory intervention prior to evidence-based practice to its scientific reframing with the emergence of randomized controlled trials and the pivotal contributions of mid-20th-century research. The article examines the mechanisms underlying placebo effects, focusing on neurobiological processes involving pain-modulating brain networks, endogenous opioid and dopaminergic pathways, and emerging evidence for hormonal and immune system involvement, alongside psychological mechanisms such as conditioning, patient expectations, and therapeutic engagement. Different types of placebo interventions, including placebo pills, sham procedures, and surgical placebos, are discussed to illustrate how treatment context and ritual contribute to symptom improvement. The methodological role of placebos in clinical trials is outlined, emphasizing randomization, blinding, allocation concealment, and outcome measurement as essential elements for distinguishing true treatment effects from non-specific influences. Clinical evidence of placebo effects is reviewed in pain management, including chronic and acute pain conditions, as well as in mental health disorders such as depression and anxiety. Case studies highlighting both successful applications and failures of placebo effects are presented, followed by a discussion of key limitations related to study design, response variability, and ethical concerns, including deception and withholding treatment. By integrating historical, mechanistic, methodological, clinical, and ethical perspectives that are often addressed separately in existing literature, this narrative review aims to fill an important gap by providing a cohesive and comprehensive synthesis of the placebo effect and its relevance to contemporary research and clinical practice, while clarifying its potential and limitations.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.