{
  "abstract": "Purpose: This meta-analysis seeks to examine the impact of different dosages of N-acetylcysteine (NAC) on pulmonary function in individuals with Chronic Obstructive Pulmonary Disease (COPD) and to clarify the dose-response relationship.\n\nPatients and methods: Systematic searches were performed in PubMed, the Wanfang Database, Cochrane Library, and China National Knowledge Infrastructure (CNKI) for pertinent randomized controlled trials (RCTs) published from 2000 to 2024. Research examining various dosages of N-acetylcysteine (NAC) for the management of chronic obstructive pulmonary disease (COPD) was incorporated. The methodological quality of the selected literature was evaluated utilizing the Cochrane Risk of Bias tool. This Meta-analysis was performed using RevMan software(version 5.4). The primary outcomes were lung function parameters, including forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), and the FEV1/FVC ratio.\n\nResults: High-dose NAC(≥ 1200 mg/d)demonstrated significant improvements in FEV1,FVC, and the FEV1/FVC ratio, whereas low-dose NAC(<1200 mg/d)showed nonsignificant effects. Substantial heterogeneity was observed for some outcomes. However, the efficacy of the high-dose regimen remained robust following sensitivity analysis.\n\nConclusion: The findings of this study provide novel evidence supporting the differential effects of various NAC doses on improving lung function parameters in COPD patients. They suggest that high-dose NAC(≥ 1200 mg/d)may represent a preferred dosing strategy for enhancing lung function in COPD.\n\nPROSPERO registration number: CRD420251154781.\n\nSupplementary Information: The online version contains supplementary material available at https://doi.org/10.1186/s12890-026-04523-5.",
  "abstract_shown": true,
  "affiliations": [
    "The Second School of Clinical Medicine, Zhejiang Chinese Medical University, Hang Zhou, Zhejiang Province People’s Republic Of China",
    "Department of Geriatrics, The Second Affiliated Hospital of Zhejiang Chinese Medical University (Xinhua Hospital of Zhejiang Province), Hangzhou, Zhejiang People’s Republic Of China"
  ],
  "article_type": "review article",
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Yifan Wang"
    },
    {
      "affs": [
        0
      ],
      "name": "Xiaomin Chen"
    },
    {
      "affs": [
        1
      ],
      "name": "Jie Huang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8zwg695v5emt8.bib",
  "cited_by": 0,
  "doi": "10.1186/s12890-026-04523-5",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13712092/",
  "id": "8zwg695v5emt8",
  "issns": [
    "1471-2466"
  ],
  "landing_url": "https://doi.org/10.1186/s12890-026-04523-5",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Systematic Review"
    ],
    [
      "openalex",
      "2740|Chronic Obstructive Pulmonary Disease (COPD) Research"
    ]
  ],
  "openalex": "W7171796951",
  "pdf_url": null,
  "pmcid": "PMC13712092",
  "pmid": "42934635",
  "published": "2026-07-30",
  "publisher": "BMC",
  "ris": "https://research.draconitic.com/paper/8zwg695v5emt8.ris",
  "sources": [
    {
      "first_seen": "2026-10-31T12:22:44Z",
      "native_id": "PMC13712092",
      "source": "pmc",
      "url": "https://doi.org/10.1186/s12890-026-04523-5"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2740|Chronic Obstructive Pulmonary Disease (COPD) Research",
      "subfield": "general"
    }
  ],
  "title": "Effects of different doses of N-acetylcysteine on lung function in patients with chronic obstructive pulmonary disease: a meta-analysis",
  "title_text": "Effects of different doses of N-acetylcysteine on lung function in patients with chronic obstructive pulmonary disease: a meta-analysis",
  "type": "peer-reviewed",
  "updated_at": "2026-10-31T12:22:44Z",
  "url": "https://research.draconitic.com/paper/8zwg695v5emt8",
  "venue": "BMC Pulmonary Medicine",
  "versions": []
}