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The risk of antidepressant-induced hyponatremia: A meta-analysis of antidepressant classes and compounds

Part of: Understanding and Treating Mood and Anxiety Disorders

Published online by Cambridge University Press:  27 August 2024

T. Gheysens ,
L. De Picker  and
F. Van Den Eede
T. Gheysens*
Affiliation:
1Psychiatry, AZ Klina, Brasschaat
L. De Picker
Affiliation:
2SINAPS, Duffel 3CAPRI, Antwerp
F. Van Den Eede
Affiliation:
3CAPRI, Antwerp 4Psychiatry, Antwerp University Hospital, Edegem, Belgium
*
*Corresponding author.

Abstract

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Introduction

Hyponatremia (hypoNa) is a potentially serious adverse event of treatment with antidepressants. Previous research suggests that risk of drug-induced hyponatremia differs between antidepressants.

Objectives

This meta-analysis sought to determine the risk of antidepressant-induced hypoNa, stratified by different compounds and classes.

Methods

PubMed and Web of Science were searched for studies reporting on incidence or risk of hypoNa in adults using antidepressants (PROSPERO, CRD42021269801). We modelled random-effects meta-analyses to compute overall incidence and risk of any and clinically relevant hypoNa for each compound and class, and ran head-to-head comparisons based on hypoNa incidences. We conducted subgroup analyses for geriatric populations, study context and sodium cut-off value.

Results

Thirty-nine studies (n = 8,459,033) revealed that exposure to antidepressants was associated with significantly increased odds of hypoNa (OR = 2.82 (1.79 – 4.45)). The highest event rates were found for SNRIs (7.17%), SSRIs (5.20%), and TCAs (2.26%); the lowest for mirtazapine (1.02%) and trazodone (0.89%). The highest odds ratios were found for MAOIs (4.12 (1.92 – 8.86)), SNRIs (3.16 (1.77 – 5.67)), and SSRIs (2.78 (1.57 – 4.91)); the lowest for mirtazapine (2.82 (1.87 – 4.21)) and TCAs (1.85 (1.28 – 2.69)). Compared to SSRIs, SNRIs were significantly more likely (OR = 1.27 (1.13 – 1.42), p < 0.001) and mirtazapine significantly less likely (OR = 0.61 (0.39 – 0.96), p = 0.032) associated with hypoNa.

Conclusions

Our meta-analysis demonstrated that, while no antidepressant can be considered completely risk-free, for hypoNa-prone patients mirtazapine should be considered the treatment of choice and SNRIs should be prescribed more cautiously than SSRIs and TCAs.

Disclosure of Interest

None Declared

Type
Abstract
Information
European Psychiatry , Volume 67 , Special Issue S1: Abstracts of the 32nd European Congress of Psychiatry , April 2024 , pp. S95
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of European Psychiatric Association
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