Evidence map›Paper›PMID 40497407›Full record

Trial reportPain management2025

Comparative efficacy of memantine and vitamin C in postoperative pain management: a randomized clinical trial.

Masoud Saadat Fakhr, Amirhasan Mohajeri, Bahar Amini, Reza Shah Hosseini, Fatemeh Rafizadeh, Elham Esmaeili, Mahnaz Narimani Zamanabadi

Abstract readRandomized Controlled TrialComparative Study
In one paragraph

Trial report in Pain management, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Masoud Saadat FakhrFaculty of Medicine, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran.ORCID 0009-0004-8104-6824
Amirhasan MohajeriFaculty of Medicine, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran.ORCID 0000-0002-4744-4675
Bahar AminiFaculty of Medicine, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran.ORCID 0000-0002-3992-8936
Reza Shah HosseiniMedical Student, Faculty of Medicine, Istanbul Medipol University, Istanbul, Turkey.ORCID 0009-0009-4853-8794
Fatemeh RafizadehFaculty of Medicine, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran.ORCID 0000-0002-1339-5684
Elham EsmaeiliFaculty of Medicine, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran.ORCID 0000-0002-8856-3494
Mahnaz Narimani ZamanabadiDepartment of Anesthesiology, Faculty of Medicine, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.ORCID 0009-0008-1899-4951

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimAcute postoperative pain affects most surgical patients, often delaying recovery. Memantine (Namenda®), an N-methyl-D-aspartate (NMDA) receptor antagonist, offers potential for effective pain relief with minimal adverse effects. This study examines memantine's effectiveness in reducing acute postoperative pain and opioid consumption compared to vitamin C, which served as an active comparator. PATIENTS AND

methodsThis double-blind randomized clinical trial was conducted in 2021 at a single tertiary-care hospital (Boali, Amirul Mominin, and Farhikhtegan Hospital). Patients aged 15-75 undergoing elective abdominal surgery were randomized to receive either memantine (

resultsMemantine significantly reduced postoperative pain at all intervals compared to vitamin C (

conclusionsMemantine was more effective than vitamin C (active comparator) in reducing acute postoperative pain and opioid requirements following elective abdominal surgery. These findings support memantine's potential as a non-opioid adjunct for pain management in this population. However, limitations include a small sample size, single-center design, and short follow-up period. Further multicenter trials with larger cohorts and extended observation are warranted to confirm these results and optimize dosing strategies. CLINICALTRIALREGISTRATION: https://irct.behdasht.gov.ir/trial/80349 is: IRCTID: IRCT20240120060739N1).

Indexed as

Ascorbic AcidMemantinePostoperative PainAdolescentAdultAgedAnalgesics, OpioidDouble-Blind MethodFemaleHumansMaleMiddle AgedPain MeasurementYoung AdultAnalgesics, OpioidAscorbic AcidMemantineabdominalmemantinPainpostoperativesurgeryvitamin C

Identifiers

PMID40497407
PMCPMC12218531

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.