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A systematic review of selective serotonin reuptake inhibitor (SSRI)-induced activation and manic/hypomanic switch in children and adolescents Cover

A systematic review of selective serotonin reuptake inhibitor (SSRI)-induced activation and manic/hypomanic switch in children and adolescents

Open Access
|Dec 2025

Figures & Tables

FIGURE 1.

Flow diagram of the selection process
Flow diagram of the selection process

FIGURE 2.

Differences between symptoms reported for activation and for mania/hypomania.
Differences between symptoms reported for activation and for mania/hypomania.

Mania/hypomania

Title, author, yearStudy designParticipants (n)Age years mean (SD)Term/s usedClear definitionDefinitionReferenceAssessment instrumentReferenceInter-rater/Test-re-test reliability
A randomised controlled trial of cognitive behavior therapy in adolescents with major depression treated by selective serotonin reuptake inhibitors. The ADAPT trial. Goodyer et al, 2008RCT20814 (1.5)HypomaniaNoN.ANoNoNoN.A
SSRI-induced disinhibition syndrome
Age Effects on Antidepressant-Induced Manic Conversion. Martin et al, 2004Retrospective clinical study87 920a Range: 5–29Manic conversationYesPatients treated with SSRI who received a new diagnosis of bipolar disorder or developed mania after two months of treatment.NoNoNoN.A
Antidepressant-induced manic switching
An open study of the effects of sertraline on adolescent major depression. McConville et al, 1996Open trial1315.1 (1.6)SSRI-induced maniaNoN.ANoNoNoN.A
Case report: Mixed mania—Apparent induction in an adolescent by a selective serotonin reuptake inhibitor antidepressant (SSRI). James, 1996Case reports115Mixed maniaNoN.ANoNoNoN.A
Citalopram and mania. Pravin et al, 2004Case reports412.5 (3.8)Developed maniaYesSSRI-induced manic symptoms according to DSM-IV.DSM-IVNoNoNo
Developed hypomania
Drug-induced switch
SSRI-induced switch
Escitalopram-associated mania in a child. Kul et al, 2008Case reports111Developed maniaNoN.ANoNoNoN.A
SSRI-induced mania
Fluoxetine-related mania in an adolescent girl diagnosed with selective mutism: A case report. Akaltun & Ayaydin, 2020Case reports116Mania symptomsNoN.ANoNoNoN.A
Developing hypomania/mania
SSRI-induced mania
Mania associated with fluoxetine treatment in adolescents. Venkataraman et al, 1992Case reports514.6 (0.5)SSRI-induced hypomania/maniaNoN.ANoNoNoN.A
Mania induced by sertraline in a prepubertal child Ghaziuddin, 1994Case reports17SSRI-induced maniaYesAll features of a DSM-III-R manic episode.DSM-III-RNoNoNo
Manic Symptoms as a Symptom of Antidepressant Discontinuation Syndrome in a Child Özcan et al, 2013Case reports112Antidepressant withdrawal/discontinuation hypomania/maniaYes1. A manic state that starts after stopping or reducing the dose of an antidepressant.Narayan and Haddad (2012)NoNoN.A
2. No pharmacological confounders are present that could account for the manic state.
3. Continuous antidepressant treatment for at least 4 weeks before the manic state began.
4. Symptoms began within 1 week of antidepressant stoppage or dose reduction.
More on SSRI-induced mania Kat, 1996Case reports215 (1.0)SSRI-induced maniaNoN.ANoNoNoN.A
Paroxetine induced mania Oldroyd, 1997Case reports116SSRI-induced maniaNoN.ANoNoNoN.A
Paroxetine induced mania in pre-adolescence Sharkey & O’Donovan, 2004Case reports211.5 (0.5)SSRI-induced maniaNoN.ANoNoNoN.A
Paroxetine pharmacokinetics in depressed children and adolescents Findling et al, 1999Open trial3011.2 (2.9)Developed HypomaniaNoN.ANoNoNoN.A
SSRI-induced mania Heimann & March, 1996Case reports115“Psychic akathisia”, drug-induced switching to mania, SSRI-induced mania or switchingNoN.ANoNoNoN.A
SSRI-induced mania in obsessive-compulsive disorder Diler & Avci, 1999Case reports39.3 (0.5)SSRI-induced maniaNoN.ANoNoNoN.A
SSRI-induced mania: Comment Grubbs, 1997Case reports114SSRI-induced maniaNoN.ANoNoNoN.A
The Effectiveness and Tolerability of Citalopram in a Turkish Sample of Children with Obsessive Compulsive Disorder Toros et al, 2002Open trial2310.6 (2.5)Hypomania, SSRI-induced hypomaniaNoN.ANoNoNoN.A

Activation

Article name and authorStudy designParticipants (n)Age (n = years)Term usedClear definitionDefinitionReferenceAssessment instrumentReferenceInter-rater/Test-re-test reliability
A pilot study of actigraphy as an objective measure of SSRI activation symptoms: results from a randomized placebo controlled psychopharmacological treatment study Bussing et al, 2015RCT4411.8 (3.3)Activation syndromeYesFive symptom clusters, irritability, akathisia, disinhibition, mania, and self-harm.(43)TEASAP(21)No
Activation Adverse Events Induced by the Selective Serotonin Reuptake Inhibitor Fluvoxamine in Children and Adolescents Reinblatt et al, 2009RCT4510.0 (2.4) bActivation cluster adverse eventsYes1. Activation: Activated, disruptive, activation, animated;NoAdverse Event questionnaireNoYes
2. Disinhibition: Disinhibited, doing things they wouldn’t normally do, disinhibition, aggression or outburst;
3. Hyperactivity: Hyper, hyperactivity, increased energy
Development and Psychometric Evaluation of the Treatment Emergent Activation and Suicidality Assessment Profile J. M. Reid et al, 2010Open trial3012.1 (2.9)Activation syndromeYesSymptoms of behavioral activation by antidepressants can vary greatly, manifesting as any combination of the following: irritability, agitation, somatic symptoms of anxiety, panic attacks, restlessness, hostility, aggressiveness, insomnia, disinhibition, emotional lability, impulsivity, social withdrawal, restlessness, hypomania/mania, paranoia or other psychotic symptoms, or other unusual changes in behavior or mood.Based upon review of the literature, and discussion among manuscript authors, as well as the FDA hearings in 2004.TEASAPN.AYes
Constructs initially selected as most congruent with activation syndrome “irritability;” “disinhibition/impulsivity;” and “akathisia.”
Low-Dose Fluvoxamine Treatment of Children and Adolescents with Pervasive Developmental Disorders: A Prospective, Open-Label Study Martin et al, 2003Open trial1811.3 (3.6)Behavioral activationNoN.ANoNoNoN.A
Paroxetine Open-Label Treatment of Pediatric Out patients With Obsessive-Compulsive Disorder Rosenberg et al, 1999Open trial2011.1 (2.4)Behavioral activationNoN.ANoNoNoN.A
Psychometric properties of the Treatment-Emergent Activation and Suicidality Assessment Profile (TEASAP) in youth with OCD Bussing et al, 2013RCT5611.7 (3.3)ActivationYesFive symptom clusters, irritability, akathisia, disinhibition, mania, and self-harm.(43)TEASAP(43)Yes
Behavioral activationCGI-SA(74)
Selective Serotonin Reuptake Inhibitor-Induced Behavioral Activation in the PANDAS Subtype Murphy et al, 2006Case reports19Behavioral activationNoN.ANoNoNoN.A
Side-effects of SSRIs disrupt multimodal treatment for pediatric OCD in a randomized-controlled trial A. M. Reid et al, 2015RCT5611.70 (3.30)Activation syndromeYes“irritability, akathisia, disinhibition, mania, and self-harm.”(21)TEASAP(21)No
SSRIs associated with behavioral activation and suicidal ideation Vorstman et al, 2001Case reports110Behavioral activation,YesThe occurrence of symptoms of restlessness, disinhibition, and irritability as a possible side effect of SSRI treatment has been differently named as (hypo)mania, psychic akathisia, and behavioral activation.(75)NoNoN.A
(Hypo)mania, psychic akathisia
Suicidal events in the Treatment for Adolescents With Depression Study (TADS). Vitiello et al, 2009RCT43914.6 (1.5)Behavioral activationYesAnxiety, irritability, agitation, and insomnia(76)Adolescent Depression ScaleNoNo
The SOFIA Study: Negative Multi-center Study of Low Dose Fluoxetine on Repetitive Behaviors in Children and Adolescents with Autistic Disorder Herscu et al, 2020RCT158b9.1 (3.3)Activation syndromeYesActivation symptoms were identified a priori and were grouped into four symptom categories: Mood alteration, changes in sleep, changes in reactivity, and changes in energy. If they showed two or more symptoms.NoNoNoN.A
Tolerability of selective serotonin reuptake inhibitors in thirty-nine children under age seven: a retrospective chart review Zuckerman et al, 2007Retrospective clinical study395.9 (0.8)Behavioral activationNoN.ANoNoNoN.A
Language: English
Page range: 117 - 134
Published on: Dec 10, 2025
Published by: Psychiatric Research Unit
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2025 Ali Dadfar, Mia Ramklint, Sara von Wallenberg Pachaly, published by Psychiatric Research Unit
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.