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This review evaluated whether starting norepinephrine within the first hour of shock recognition or after ICU admission offers advantages versus delayed treatment. Searches across major databases (2010 to May 2025) identified 28 eligible studies, with 9 included in meta-analysis. Pooled randomized evidence showed a modest, statistically non-significant mortality reduction, whereas observational studies suggested a significant survival benefit.",{"@graph":69,"@context":126},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/early-versus-delayed-norepinephrine-initiation-in-septic-shock-a-systematic-review-and-meta-analysis-of-randomized-and-observational-studies/454850/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/early-versus-delayed-norepinephrine-initiation-in-septic-shock-a-systematic-review-and-meta-analysis-of-randomized-and-observational-studies/454850.png","ImageObject",300,407,{"name":92,"@type":93},"Cart","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-30",true,{"@type":102,"interactionType":103,"userInteractionCount":52},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118,122],{"name":109,"@type":110,"acceptedAnswer":111},"What question does this review address about norepinephrine timing in septic shock?","Question",{"text":112,"@type":113},"It assesses whether initiating norepinephrine within the first hour after shock recognition or upon ICU admission provides meaningful benefits compared with delayed initiation.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What did randomized studies show about early norepinephrine and mortality?",{"text":117,"@type":113},"Early norepinephrine was associated with a modest reduction in mortality, but the result was statistically nonsignificant (RR 0.90; 95% CI 0.76-1.06; p=0.18).",{"name":119,"@type":110,"acceptedAnswer":120},"How did observational studies differ from randomized evidence in this review?",{"text":121,"@type":113},"Observational studies demonstrated a clearer survival benefit, with early initiation linked to a significant decrease in deaths (RR 0.75; 95% CI 0.60-0.94).",{"name":123,"@type":110,"acceptedAnswer":124},"Why is the timing of norepinephrine initiation considered controversial?",{"text":125,"@type":113},"Conventional protocols emphasize vasopressors after proper fluid loading, while emerging data suggest earlier use may improve physiological and clinical outcomes by reducing time to administration and helping prevent prolonged hypotension.","https://schema.org",{"og:url":83,"og:type":128,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":130,"canonical":83},"index,follow",{"doc_id":132,"site_id":62},454850,1791116566,{"code":4,"msg":5,"data":135},{"doc_id":132,"user_id":136,"nickname":92,"user_avatar":137,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":138,"file_id":139,"file_url":140,"file_type":141,"file_size":142,"view_count":52,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":143,"language":144,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":145,"faqs":146,"seo_title":147,"seo_description":67,"update_tm":148,"read_time":149,"preview_page_count":4},18829141979164,"https://eur-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","Review began 11/23/2025  \nReview ended 12/04/2025  \nPublished 12/08/2025  \n© Copyright 2025  \nManafa et al. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0. , which permits unrestricted use , distribution , and reproduction in any medium , provided the original author and source are credited.  \nDOI: 10.7759/cureus.98694  \nOpen Access Review Article  \nEarly Versus Delayed Norepinephrine Initiation in Septic Shock: A Systematic Review and MetaAnalysis of Randomized and Observational Studies  \nChibuzo C. Manafa 1, Oluwayemisi E. Ekor 2, Akintunde C. Akinboboye 3, Okelue E. Okobi 4, 5 , Gift Ojukwu 6, Osemwegie O. Ugbo 4, Michael U. Mochu 7, Emasenyie Isikwei 4, Sergio Hernandez Borges 8,  \nMiguel Diaz-Miret 4  \n1. Family Medicine, Queensland Medical Clinic, Calgary, CAN 2. Medicine, School of Medical Sciences, University of Cape Coast, Cape Coast, GHA 3. Emergency, University of Medical Sciences Teaching Hospital, Ondo, NGA 4. Family Medicine, Larkin Community Hospital Palm Springs Campus, Hialeah, USA 5. Family Medicine, IMG Research Academy and Consulting LLC, Homestead, USA 6. General Practice, Leeds Teaching Hospital, Leeds, GBR 7. Family Medicine, University of Nigeria College of Medicine, Enugu, NGA 8. Internal Medicine/Family Medicine, Larkin Community Hospital Palm Springs Campus, Hialeah, USA  \nCorresponding author: Oluwayemisi E. Ekor, [oluwayemisi.ekor@ucc.edu.gh](oluwayemisi.ekor@ucc.edu.gh)  \nAbstract  \nSeptic shock remains a major cause of illness and death worldwide despite improvements in critical care, and the optimal timing for starting norepinephrine continues to generate debate.  \nThis review assessed whether administering norepinephrine within the first hour of recognizing shock or upon ICU admission provides meaningful advantages compared with delayed initiation.  \nA broad search of major databases from 2010 to May 2025 identified randomized trials and observational studies examining early versus later administration. Twenty-eight studies met the inclusion criteria, and nine were eligible for meta-analysis.  \nThe pooled results showed that early norepinephrine was associated with a modest but statistically nonsignificant reduction in mortality (RR 0.90; 95% CI 0 .76-1.06; p = 0 . 18) . Observational studies, however, demonstrated a clearer survival benefit, with early initiation linked to a significant decrease in deaths (RR 0.75; 95% CI 0 .60-0.94) . Moderate heterogeneity (I² = 65 .6%) likely reflected variation in study design, patient severity, and differences in defining early treatment.  \nOverall, the evidence suggests that early norepinephrine may help stabilize hemodynamics more quickly and could improve clinical outcomes, though current randomized data remain limited.  \nFurther high-quality research is needed to better define the magnitude of benefit and guide consistent practice.  \nCategories: Pain Management, Internal Medicine, Oral Medicine  \nKeywords: early norepinephrine, hemodynamic stabilization, meta-analysis, mortality, septic shock, vasopressor timing  \nIntroduction And Background  \nSeptic shock has remained a leading cause of mortality and morbidity, despite the advances in critical care management in the world and the integration of technology in healthcare [1] . Septic shock is formally defined as sepsis with persistent hypotension requiring vasopressors and elevated lactate levels despite adequate fluid resuscitation. It is the most extreme form of sepsis, which is a condition of life-threatening circulatory and cellular abnormalities leading to severe hypotension and hypoperfusion of the tissues [2-3]. The prevalence of sepsis is said to claim close to 11 million lives each year across the world, most of whom succumb to septic shock [4] . Early identification and immediate hemodynamic resuscitation are key survival factors because delayed resuscitation is closely linked with the development of dysfunction in all organs, ","cbCaieaE91Q892Cw","https://ap.wps.com/l/cbCaieaE91Q892Cw","pdf",1944017,13,"English","# Abstract\n# Introduction and Background\n## Definition and burden of septic shock\n## Management priorities and role of norepinephrine\n## Timing controversy and clinical rationale\n# How to cite this article","[{\"question\":\"What question does this review address about norepinephrine timing in septic shock?\",\"answer\":\"It assesses whether initiating norepinephrine within the first hour after shock recognition or upon ICU admission provides meaningful benefits compared with delayed initiation.\"},{\"question\":\"What did randomized studies show about early norepinephrine and mortality?\",\"answer\":\"Early norepinephrine was associated with a modest reduction in mortality, but the result was statistically nonsignificant (RR 0.90; 95% CI 0.76-1.06; p=0.18).\"},{\"question\":\"How did observational studies differ from randomized evidence in this review?\",\"answer\":\"Observational studies demonstrated a clearer survival benefit, with early initiation linked to a significant decrease in deaths (RR 0.75; 95% CI 0.60-0.94).\"},{\"question\":\"Why is the timing of norepinephrine initiation considered controversial?\",\"answer\":\"Conventional protocols emphasize vasopressors after proper fluid loading, while emerging data suggest earlier use may improve physiological and clinical outcomes by reducing time to administration and helping prevent prolonged hypotension.\"}]","Early Versus Delayed Norepinephrine Initiation in Septic Shock - A Systematic Review and Meta-Analysis of Randomized and Observational Studies | PDF",1790741495,33]