Cited by 77Transcranial Magnetic Stimulation StudiesPain Management and Placebo EffectElectroconvulsive Therapy Studies

Safety, tolerability, and nocebo phenomena during transcranial magnetic stimulation: A systematic review and meta-analysis of placebo-controlled clinical trials

Zis, Panagiotis, Shafique, Faiza, Hadjivassiliou, Marios, Blackburn, Daniel, Venneri, Annalena, Iliodromiti, Stamatina, Mitsikostas, Dimos-Dimitrios, Sarrigiannis, Ptolemaios G.·2020·Neuromodulation: Technology at the Neural Interface

Abstract

Background The methodology used for the application of repetitive transcranial magnetic stimulation (TMS) is such that it may induce a placebo effect. Respectively, adverse events (AEs) can occur when using a placebo, a phenomenon called nocebo. The primary aim of our meta-analysis is to establish the nocebo phenomena during TMS. Safety and tolerability of TMS were also studied. Methods After a systematic Medline search for TMS randomized controlled trials (RCTs), we assessed the number of patients reporting at least one AE and the number of discontinuations because of AE in active and sham TMS groups. Results Data were extracted from 93 RCTs. The overall pooled estimate of active TMS and placebo treated patients who discontinued treatment because of AEs was 2.5% (95% CI 1.9%-3.2%) and 2.7% (95% CI 2.0%-3.5%), respectively. The pooled estimate of active TMS and placebo treated patients experiencing at least one AE was 29.3% (95% CI 19.0%-22.6%) and 13.6% (95% CI 11.6%-15.8%), respectively, suggesting that the odds of experiencing an AE is 2.60 times higher (95% CI 1.75-3.86) in the active treatment group compared to placebo (p < 0.00001). The most common AE was headache, followed by dizziness. Secondary meta-analyses in depression and psychotic disorders showed that the odds of experiencing an AE is 3.98 times higher (95% CI 2.14-7.40) and 2.93 times higher (95% CI 1.41-6.07), respectively, in the active treatment groups compared to placebo. Conclusions TMS is a safe and well-tolerated intervention. Nocebo phenomena do occur during TMS treatment and should be acknowledged during clinical trial design and daily clinical practice.

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  1. [15]15. Duecker F, Sack AT. Rethinking the role of sham TMS. Front Psychol. 2015 Feb 26;6:210
  2. [24]24. Mitsikostas DD, Mantonakis L, Chalarakis N. Nocebo in clinical trials for depression: a meta-analysis. Psychiatry Res. 2014 Jan 30;215(1):82-6.
  3. [26]26. Mitsikostas DD, Chalarakis NG, Mantonakis LI, Delicha EM, Sfikakis PP. Nocebo in fibromyalgia: meta-analysis of placebo-controlled clinical trials and implications for practice. Eur J Neurol. 2012 May;19(5):672-80.

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Authors
Zis, P., Shafique, F., Hadjivassiliou, M., Blackburn, D., Venneri, A., Iliodromiti, S., Mitsikostas, D.-D., & Sarrigiannis, P. G.
Affiliations
  • University of Cyprus (CY)
  • Sheffield Teaching Hospitals NHS Foundation Trust (GB)
  • University of Sheffield (GB)
  • University of Glasgow (GB)
  • National and Kapodistrian University of Athens (GR)
Corresponding author
Zis, Panagiotis
Venue
Neuromodulation: Technology at the Neural Interface
Publisher
Elsevier BV
Published
2020-04
Volume
23
Issue
3
Pages
291-300
ISSN
1094-7159 (ISSN-L)
OpenAlex
W2923341069
Cited by
77
References
33
Citations by year
2026: 11 · 2025: 9 · 2024: 10 · 2023: 10 · 2022: 12 · 2021: 10 · 2020: 12 · 2019: 3
FWCI
0.96
Type
journal article
Language
en
Open access
closed
Locations
  • Neuromodulation Technology at the Neural Interface (publishedVersion)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
Topics
  • Life Sciences › Neuroscience › Neurology › Transcranial Magnetic Stimulation Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
  • Health Sciences › Medicine › Psychiatry and Mental health › Electroconvulsive Therapy Studies
Keywords
repetitive transcranial magnetic stimulation, nocebo effect, placebo effect, adverse events, treatment safety, tolerability, sham stimulation, headache, dizziness, depression, psychosis
MeSH terms
Female, Humans, Male, Transcranial Magnetic Stimulation, Nocebo Effect

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