Cited by 39Schizophrenia research and treatmentMedication Adherence and ComplianceBipolar Disorder and Treatment

The impact of weight gain on antipsychotic nonadherence or discontinuation: a systematic review and meta-analysis

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De, Riddhita, Smith, Emily C. C., Navagnanavel, Janani, Au, Emily, Maksyutynska, Kateryna, Papoulias, Maria, Singh, Raghunath, Panganiban, Kristoffer J. +7 more·2025·Acta Psychiatrica Scandinavica

Abstract

BACKGROUND: Nonadherence/discontinuation of antipsychotic (AP) medications represents an important clinical issue in patients across psychiatric disorders, including schizophrenia spectrum disorders (SSDs). While antipsychotic-induced weight gain (AIWG) is a reported contributor to nonadherence, a systematic review of the association between AIWG and medication nonadherence/discontinuation has not been explored previously. METHOD: A systematic search was conducted in MEDLINE, EMBASE, PsychINFO, CINAHL, and CENTRAL databases, among others, to help identify all studies which explored adherence, study dropouts, AP switching and/or discontinuations attributable to AIWG among individuals with severe mental illness. A meta-analysis was also completed where applicable. RESULTS: We identified two categories of studies for the meta-analysis. Category 1 included three studies, which compared measures of AP adherence or discontinuation across BMI classes/degrees of self-reported weight gain. When compared to normal weight individuals receiving APs or those who did not report AIWG, individuals who were either overweight or obese or reported weight gain in relation to AP use had an increased odds of AP nonadherence (OR 2.37; 95% CI 1.51-3.73; p = 0.0002). Category 2 had 14 studies which compared measures of discontinuation related to weight gain reported as an adverse effect across different APs. Olanzapine was associated with a 3.32 times (95% CI 2.32-4.74; p < 0.00001) increased likelihood of nonadherence or discontinuation when compared to other APs with lower weight gain liabilities. Similarly, APs with moderate weight gain liability (paliperidone, risperidone, and quetiapine) increased the odds of nonadherence or discontinuation by 2.25 (95% CI 1.31-3.87; p = 0.003) when compared to APs considered to have lower weight gain liability (i.e. haloperidol and aripiprazole). The qualitative summary also confirmed these findings. CONCLUSION: This review and meta-analysis suggests that AIWG influences medication nonadherence/discontinuation, whereby APs with higher weight gain liability are associated with nonadherence/discontinuation. Additional studies are needed to confirm these findings.

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  • Antipsychotic use in severe mental illnesses is associated with metabolic dysregulation, including antipsychotic-induced weight gain, type 2 diabetes, and dyslipidemia.

    “Antipsychotic use in severe mental illnesses (SMI) is associated with metabolic dysregulation, including antipsychotic-induced weight gain (AIWG), type 2 diabetes (T2D), and dyslipidemia.”

    From The Effect of Semaglutide on Antipsychotic-Induced Weight Gain and Other Metabolic Parameters, among a Cohort of Inpatients (2026) · cites this paper as [11]

    The Introduction describes antipsychotic-induced weight gain as a common side effect, and the Results (Meta-analysis; page not provided) report dyslipidemia and changes in glucose metabolism among antipsychotic-treated patients. The paper does not identify type 2 diabetes as one of these outcomes; glucose intolerance and altered glucose metabolism do not establish that part of the claim. (LLM, conf=0.87)

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Authors
De, R., Smith, E. C. C., Navagnanavel, J., Au, E., Maksyutynska, K., Papoulias, M., Singh, R., Panganiban, K. J., Humber, B., Mohr, G. H., Nielsen, M. Ø., Ebdrup, B. H., Remington, G., Agarwal, S. M., & Hahn, M. K.
Affiliations
  • Centre for Addiction and Mental Health (CA)
  • University of Copenhagen (DK)
Corresponding author
Hahn, Margaret K.
Venue
Acta Psychiatrica Scandinavica
Publisher
Wiley
Published
2024-09-17
Volume
151
Issue
2
Pages
109-126
ISSN
  • 0001-690X (ISSN-L)
  • 1600-0447
OpenAlex
W4402567539
Cited by
39
References
70
Citations by year
2026: 17 · 2025: 20 · 2024: 2
FWCI
3.10
Type
journal article
Language
en
Open access
Locations
  • Acta Psychiatrica Scandinavica (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, cc-by)
Funders
Novo Nordisk Fonden (NNF20OC0065652)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Health Sciences › Medicine › Family Practice › Medication Adherence and Compliance
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
Keywords
antipsychotic-induced weight gain, antipsychotic discontinuation, medication adherence, olanzapine, schizophrenia spectrum disorders, severe mental illness, obesity, overweight, paliperidone, risperidone, quetiapine, haloperidol, aripiprazole

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