Cited by 255Treatment of Major DepressionAnxiety, Depression, Psychometrics, Treatment, Cognitive ProcessesNeurotransmitter Receptor Influence on Behavior

Effect of a single dose of citalopram on amygdala response to emotional faces

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Murphy, Susannah E., Norbury, Raymond, O'Sullivan, Ursula, Cowen, Philip J., Harmer, Catherine J.·2009·British Journal of Psychiatry

Abstract

Background: Selective serotonin reuptake inhibitors (SSRIs) are typically thought to have a delay of several weeks in the onset of their clinical effects. However, recent reports suggest they may have a much earlier therapeutic onset. A reduction in amygdala responsivity has been implicated in the therapeutic action of SSRIs. Aims: To investigate the effect of a single dose of an SSRI on the amygdala response to emotional faces. Method: Twenty-six healthy volunteers were randomised to receive a single oral dose of citalopram (20 mg) or placebo. Effects on the processing of facial expressions were assessed 3 h later using functional magnetic resonance imaging. Results: Volunteers treated with citalopram displayed a significantly reduced amygdala response to fearful facial expressions compared with placebo. Conclusions: Such an immediate effect of an SSRI on amygdala responses to threat supports the idea that antidepressants have an earlier onset of therapeutically relevant effects than conventionally thought.

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Crossref · 10.1192/bjp.bp.108.056093

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  • Evidence following single-dose citalopram treatment on amygdala reactivity is mixed, with both increases and decreases reported.

    “In reality, however, the evidence following single-dose treatment is rather mixed, and both increases in amygdala reactivity52 and decreases53 have been reported; see for example the recent review in ref 54 and metaanalysis in ref 55.”
  • Antidepressant medications reduce amygdala activation to threatening stimuli and increase visual association cortex response to positive stimuli.

    “Direct experimental evidence indicates that antidepressant medications reduce amygdala activation to threatening stimuli and increase visual association cortex response to positive stimuli (16–21)”
  • Antidepressant drugs may alter attentional habit via an effect on early stimulus appraisal rather than on higher order control processes.

    “suggesting that these drugs may alter attentional habit via an effect on early stimulus appraisal rather than on higher order control processes.”

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1 of the 42 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. [11]First MB, Spitzer RL, Gibbon M, Williams JBW. Structured Clinical Interview for DSM–IV Axis I Disorders (SCID–I). American Psychiatric Press, 1997.

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Authors
Murphy, S. E., Norbury, R., O'Sullivan, U., Cowen, P. J., & Harmer, C. J.
Affiliations
Warneford Hospital (GB)
Corresponding author
Murphy, Susannah E.
Venue
British Journal of Psychiatry
Published
2009-06
Volume
194
Issue
6
Pages
535-540
ISSN
  • 0007-1250 (ISSN-L)
  • 1472-1465
OpenAlex
W2135286048
Cited by
255
References
42
Citations by year
2026: 7 · 2025: 11 · 2024: 12 · 2023: 6 · 2022: 15 · 2021: 17 · 2020: 14 · 2019: 12 · 2018: 12 · 2017: 13 · 2016: 10 · 2015: 19 · 2014: 15 · 2013: 28 · 2012: 15
FWCI
14.85
Type
journal article
Language
en
Open access
Locations
  • The British Journal of Psychiatry (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Wellcome Trust
Topics
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
citalopram, selective serotonin reuptake inhibitors, amygdala, emotional facial expressions, facial expression processing, fear, antidepressant onset of action, threat processing
MeSH terms
Adult, Amygdala, Emotions, Facial Expression, Female, Humans, Magnetic Resonance Imaging, Male, Citalopram, Treatment Outcome, Selective Serotonin Reuptake Inhibitors, Antidepressive Agents, Second-Generation, Young Adult

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