Effects of neostigmine on postoperative neurocognitive dysfunction: a systematic review and meta-analysis

IntroductionPostoperative neurocognitive dysfunction (PND) is a common and serious complication following surgery. Neostigmine, an acetylcholinesterase inhibitor commonly administered during anesthesia to reverse residual neuromuscular blockade, has been suggested in recent studies to potentially re...

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Main Authors: Xuelei Zhou, Linlin Chen, Li Zhao, Wei Mao, Xianchun Liu, Longyi Zhang, Ying Xie, Linji Li
Format: Article
Language:English
Published: Frontiers Media S.A. 2025-03-01
Series:Frontiers in Neuroscience
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Online Access:https://www.frontiersin.org/articles/10.3389/fnins.2025.1464272/full
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author Xuelei Zhou
Linlin Chen
Li Zhao
Wei Mao
Xianchun Liu
Longyi Zhang
Ying Xie
Linji Li
author_facet Xuelei Zhou
Linlin Chen
Li Zhao
Wei Mao
Xianchun Liu
Longyi Zhang
Ying Xie
Linji Li
author_sort Xuelei Zhou
collection DOAJ
description IntroductionPostoperative neurocognitive dysfunction (PND) is a common and serious complication following surgery. Neostigmine, an acetylcholinesterase inhibitor commonly administered during anesthesia to reverse residual neuromuscular blockade, has been suggested in recent studies to potentially reduce the incidence of PND. However, findings have been inconsistent across studies. Therefore, this study conducts a systematic review and meta-analysis to evaluate the effect of neostigmine on PND.MethodsWe conducted a comprehensive literature search across multiple databases, including PubMed, EmBase, Web of Science, Cochrane Library, Scopus, SinoMed, and CNKI, to identify all relevant studies for inclusion. We included randomized controlled trials and cohort studies in our analysis. The risk of bias was assessed using the Risk of Bias 2 tool for randomized trials and the ROBINS-I tool for cohort studies.ResultsA total of 11 studies were included in this analysis, consisting of 8 randomized controlled trials and 3 cohort studies. The incidence of PND was significantly lower in the neostigmine group compared to the control group (log(OR): −0.54, 95% CI [−1.04, −0. 05]; OR: 0.58, 95% CI: [0.35, 0.95], p = 0.03, I2 = 81.95%). Sensitivity analysis led to the exclusion of one cohort study. Consequently, the final meta-analysis comprised 10 studies, encompassing a total of 50,881 participants. The results indicate that the incidence of PND was significantly lower in the neostigmine group compared to the control group (log(OR):−0. 27, 95% CI [−0.47, −0. 08]; OR: 0.76, 95% CI: [0.62, 0.91], p = 0.01, I2 = 2.50%). However, Meta-analysis of RCTs and cohort studies showed no significant difference. Subgroup analysis indicated that neostigmine reduced the incidence of delayed neurocognitive recovery (dNCR), but its impact on POD was unclear, with no significant association to nausea and vomiting. These findings suggest that neostigmine may reduce the risk of PND, but caution is needed in interpretation.ConclusionNeostigmine may have a potential positive effect in reducing the incidence of PND. However, no statistical difference was observed when meta-analyses were performed separately for randomized controlled trials (RCTs) and cohort studies. Given the limited number of studies available and the limitations of the current research, further investigation is needed to clarify the impact of neostigmine on PND.Systematic review registrationhttps://www.crd.york.ac.uk/PROSPERO/view/CRD42024537647, Identifier CRD42024537647.
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spelling doaj-art-90e487932878457fbc5eeabf8249f1e62025-08-20T03:02:10ZengFrontiers Media S.A.Frontiers in Neuroscience1662-453X2025-03-011910.3389/fnins.2025.14642721464272Effects of neostigmine on postoperative neurocognitive dysfunction: a systematic review and meta-analysisXuelei ZhouLinlin ChenLi ZhaoWei MaoXianchun LiuLongyi ZhangYing XieLinji LiIntroductionPostoperative neurocognitive dysfunction (PND) is a common and serious complication following surgery. Neostigmine, an acetylcholinesterase inhibitor commonly administered during anesthesia to reverse residual neuromuscular blockade, has been suggested in recent studies to potentially reduce the incidence of PND. However, findings have been inconsistent across studies. Therefore, this study conducts a systematic review and meta-analysis to evaluate the effect of neostigmine on PND.MethodsWe conducted a comprehensive literature search across multiple databases, including PubMed, EmBase, Web of Science, Cochrane Library, Scopus, SinoMed, and CNKI, to identify all relevant studies for inclusion. We included randomized controlled trials and cohort studies in our analysis. The risk of bias was assessed using the Risk of Bias 2 tool for randomized trials and the ROBINS-I tool for cohort studies.ResultsA total of 11 studies were included in this analysis, consisting of 8 randomized controlled trials and 3 cohort studies. The incidence of PND was significantly lower in the neostigmine group compared to the control group (log(OR): −0.54, 95% CI [−1.04, −0. 05]; OR: 0.58, 95% CI: [0.35, 0.95], p = 0.03, I2 = 81.95%). Sensitivity analysis led to the exclusion of one cohort study. Consequently, the final meta-analysis comprised 10 studies, encompassing a total of 50,881 participants. The results indicate that the incidence of PND was significantly lower in the neostigmine group compared to the control group (log(OR):−0. 27, 95% CI [−0.47, −0. 08]; OR: 0.76, 95% CI: [0.62, 0.91], p = 0.01, I2 = 2.50%). However, Meta-analysis of RCTs and cohort studies showed no significant difference. Subgroup analysis indicated that neostigmine reduced the incidence of delayed neurocognitive recovery (dNCR), but its impact on POD was unclear, with no significant association to nausea and vomiting. These findings suggest that neostigmine may reduce the risk of PND, but caution is needed in interpretation.ConclusionNeostigmine may have a potential positive effect in reducing the incidence of PND. However, no statistical difference was observed when meta-analyses were performed separately for randomized controlled trials (RCTs) and cohort studies. Given the limited number of studies available and the limitations of the current research, further investigation is needed to clarify the impact of neostigmine on PND.Systematic review registrationhttps://www.crd.york.ac.uk/PROSPERO/view/CRD42024537647, Identifier CRD42024537647.https://www.frontiersin.org/articles/10.3389/fnins.2025.1464272/fullneostigmineacetylcholinesterase inhibitorPNDdNCRPODPOVN
spellingShingle Xuelei Zhou
Linlin Chen
Li Zhao
Wei Mao
Xianchun Liu
Longyi Zhang
Ying Xie
Linji Li
Effects of neostigmine on postoperative neurocognitive dysfunction: a systematic review and meta-analysis
Frontiers in Neuroscience
neostigmine
acetylcholinesterase inhibitor
PND
dNCR
POD
POVN
title Effects of neostigmine on postoperative neurocognitive dysfunction: a systematic review and meta-analysis
title_full Effects of neostigmine on postoperative neurocognitive dysfunction: a systematic review and meta-analysis
title_fullStr Effects of neostigmine on postoperative neurocognitive dysfunction: a systematic review and meta-analysis
title_full_unstemmed Effects of neostigmine on postoperative neurocognitive dysfunction: a systematic review and meta-analysis
title_short Effects of neostigmine on postoperative neurocognitive dysfunction: a systematic review and meta-analysis
title_sort effects of neostigmine on postoperative neurocognitive dysfunction a systematic review and meta analysis
topic neostigmine
acetylcholinesterase inhibitor
PND
dNCR
POD
POVN
url https://www.frontiersin.org/articles/10.3389/fnins.2025.1464272/full
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