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Dry mouth effects from drugs used for depression, anxiety, schizophrenia and bipolar mood disorder in adults: systematic review

Published online by Cambridge University Press:  20 March 2023

Cherilyn Xue Wei Teoh
Affiliation:
School of Dentistry, University of Queensland, Herston, Queensland, Australia
Millie Thng
Affiliation:
School of Dentistry, University of Queensland, Herston, Queensland, Australia
Serene Lau
Affiliation:
School of Dentistry, University of Queensland, Herston, Queensland, Australia
Meng-Wong Taing
Affiliation:
School of Pharmacy, University of Queensland, Woolloongabba, Queensland, Australia
Sarah Y. Chaw
Affiliation:
School of Dentistry, University of Queensland, Herston, Queensland, Australia
Dan Siskind
Affiliation:
Metro South Addiction and Mental Health Service, Brisbane, Queensland, Australia; and School of Medicine, University of Queensland, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia
Steve Kisely*
Affiliation:
Metro South Addiction and Mental Health Service, Brisbane, Queensland, Australia; School of Medicine, University of Queensland, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia; and Departments of Psychiatry, Community Health and Epidemiology, Dalhousie University, Canada
*
Correspondence: Steve Kisely. Email: s.kisely@uq.edu.au
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Abstract

Background

Poor oral health is increasingly recognised as an important comorbidity in people with psychiatric illness. One risk factor is psychotropic-induced dry mouth.

Aims

To perform a systematic review of the severity of dry mouth due to psychotropic drugs in adults (CRD42021239725). Study quality was assessed using the Cochrane risk of bias tool.

Method

We searched the following databases: PubMed, EMBASE, PsycINFO, Cochrane Central Register of Controlled Trials, CINAHL and Web of Science. We included randomised controlled trials (RCTs) measuring the severity of drug-induced hyposalivation and xerostomia.

Results

Eighteen RCTs with 605 participants were included. Severity of drug-induced dry mouth was compared among eight drug classes and/or against placebo. All studies were published 20 to 40 years ago and included tricyclic antidepressants (TCAs), serotonin specific reuptake inhibitors (SSRIs) and other drug classes. Meta-analysis was not feasible owing to design heterogeneity. TCAs caused more severe dry mouth, both objectively and subjectively, than placebo or other drug classes. SSRIs were generally associated with less severe symptoms. However, there was no information on antipsychotics or more recently available antidepressants, and there was minimal information on mood stabilisers. Most studies were on healthy subjects, limiting the generalisability of findings. Only one study measured both objective and subjective dry mouth, which have different clinical implications.

Conclusions

Psychotropic-induced dry mouth is a poorly researched area, and well-designed RCTs of newer psychotropic drugs using standardised objective and subjective measures are indicated. Given the ongoing use of TCAs for treatment-resistant depression, prescribers need to remain vigilant for xerostomia.

Information

Type
Review
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NC
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial licence (http://creativecommons.org/licenses/by-nc/4.0), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original article is properly cited. The written permission of Cambridge University Press must be obtained prior to any commercial use.
Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of the Royal College of Psychiatrists
Figure 0

Fig. 1 Flow diagram.

Figure 1

Table 1 Included studies measuring objective dry mouth

Figure 2

Table 2 Included studies measuring subjective dry mouth

Figure 3

Table 3 Summary of comparisons

Figure 4

Table 4 Risk-of-bias judgment for each of six domains of bias for each included study

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