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Abstract Title:

Acute fluoxetine modulates emotional processing in young adult volunteers.

Abstract Source:

Psychol Med. 2015 Aug ;45(11):2295-308. Epub 2015 Apr 13. PMID: 25864939

Abstract Author(s):

L P Capitão, S E Murphy, M Browning, P J Cowen, C J Harmer

Article Affiliation:

L P Capitão

Abstract:

BACKGROUND: Fluoxetine is generally regarded as the first-line pharmacological treatment for young people, as it is believed to show a more favourable benefit:risk ratio than other antidepressants. However, the mechanisms through which fluoxetine influences symptoms in youth have been little investigated. This study examined whether acute administration of fluoxetine in a sample of young healthy adults altered the processing of affective information, including positive, sad and anger cues.

METHOD: A total of 35 male and female volunteers aged between 18 and 21 years old were randomized to receive a single 20 mg dose of fluoxetine or placebo. At 6 h after administration, participants completed a facial expression recognition task, an emotion-potentiated startle task, an attentional dot-probe task and the Rapid Serial Visual Presentation. Subjective ratings of mood, anxiety and side effects were also taken pre- and post-fluoxetine/placebo administration.

RESULTS: Relative to placebo-treated participants, participants receiving fluoxetine were less accurate at identifying anger and sadness and did not show the emotion-potentiated startle effect. There were no overall significant effects of fluoxetine on subjective ratings of mood.

CONCLUSIONS: Fluoxetine can modulate emotional processing after a single dose in young adults. This pattern of effects suggests a potential cognitive mechanism for the greater benefit:risk ratio of fluoxetine in adolescent patients.

Study Type : Human Study

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Sayer Ji
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