{
    "abstract": "Chronic kidney disease-associated pruritus (CKD-aP) can negatively impact quality of life and survival among patients receiving maintenance hemodialysis. Difelikefalin, a selective \u03ba-opioid receptor agonist, is the first medication approved for treatment of moderate-to-severe CKD-aP among patients on chronic hemodialysis. This retrospective database study assessed the real-world safety and effectiveness of difelikefalin across a large US dialysis organization.\nWe analyzed de-identified data from 715 adult hemodialysis patients treated with difelikefalin who had a Worst Itching Intensity Numerical Rating Scale (WI-NRS) score (0\u2009=\u2009no itching to 10\u2009=\u2009worst itch imaginable) assessed before therapy. Patients were classified as having received at least 30 difelikefalin doses over 12 weeks (complete regimen group; CRG) or fewer doses over that time period (incomplete regimen group; IRG). Mean baseline and follow-up WI-NRS scores were compared and potential adverse events evaluated.\nMean (SD) baseline WI-NRS scores were 8.5 (1.7), indicative of severe pruritic symptomatology. In the 22% of patients with follow-up data, mean WI-NRS scores improved by 2.9 points (8.4 [severe] to 5.4 [moderate]; P\u2009<\u20090.0001). This mean improvement was more pronounced in CRG patients (n\u2009=\u200984; 3.6) compared with IRG patients (n\u2009=\u200984; 2.2). Overall, 46% of patients experienced a 3-point reduction in itch severity. Difelikefalin initiation was not associated with changes in rates of nausea, diarrhea, vomiting, headache, or trouble walking. Dizziness and hyperkalemia were infrequent, but statistically significant with increases in dizziness (0.09% vs. 0.20%) and hyperkalemia (2.0% vs. 2.6%) were observed during treatment with difelikefalin.\nIn this analysis of real-world difelikefalin use in a US hemodialysis population, patients experienced significant reductions in CKD-aP, based on a validated measure of pruritus. Patients remaining on therapy for 12 weeks demonstrated greater symptom reductions than those patients receiving partial treatment. In combination with controlled trials, these data suggest that difelikefalin is an effective and well-tolerated treatment for the management of CKD-aP in adult patients receiving hemodialysis.",
    "authors": [
        {
            "affiliation": "Renal Research Institute, Waltham, MA, USA.",
            "firstname": "Linda H",
            "initials": "LH",
            "lastname": "Ficociello"
        },
        {
            "affiliation": "Renal Research Institute, Waltham, MA, USA.",
            "firstname": "Rachel",
            "initials": "R",
            "lastname": "Lasky"
        },
        {
            "affiliation": "Fresenius Medical Care D GmbH, Bad Homburg, Germany.",
            "firstname": "Hans-Juergen",
            "initials": "HJ",
            "lastname": "Arens"
        },
        {
            "affiliation": "CSL Vifor, Global Medical Affairs, Glattbrugg, Zurich, Switzerland.",
            "firstname": "Despina",
            "initials": "D",
            "lastname": "Ruessmann"
        },
        {
            "affiliation": "Renal Research Institute, Waltham, MA, USA. michael.anger@freseniusmedicalcare.com.\nFresenius Medical Care, Global Medical Office, Waltham, MA, USA. michael.anger@freseniusmedicalcare.com.",
            "firstname": "Michael S",
            "initials": "MS",
            "lastname": "Anger"
        }
    ],
    "conclusions": null,
    "copyrights": "\u00a9 2025. The Author(s).",
    "doi": "10.1186/s12882-025-04074-7",
    "journal": "BMC nephrology",
    "keywords": [
        "Chronic kidney disease\u2013associated pruritus",
        "Difelikefalin",
        "Hemodialysis",
        "Symptoms"
    ],
    "methods": null,
    "publication_date": "2025-03-28",
    "pubmed_id": "40148786\n32954065\n34437400\n33604539\n36510564\n25515935\n34952964\n30931482\n38680970\n26355256\n34987779\n37010031\n37128642\n31702883\n36016762\n36039153\n37016989\n24379689\n9669435\n37445539",
    "results": "Mean (SD) baseline WI-NRS scores were 8.5 (1.7), indicative of severe pruritic symptomatology. In the 22% of patients with follow-up data, mean WI-NRS scores improved by 2.9 points (8.4 [severe] to 5.4 [moderate]; P\u2009<\u20090.0001). This mean improvement was more pronounced in CRG patients (n\u2009=\u200984; 3.6) compared with IRG patients (n\u2009=\u200984; 2.2). Overall, 46% of patients experienced a 3-point reduction in itch severity. Difelikefalin initiation was not associated with changes in rates of nausea, diarrhea, vomiting, headache, or trouble walking. Dizziness and hyperkalemia were infrequent, but statistically significant with increases in dizziness (0.09% vs. 0.20%) and hyperkalemia (2.0% vs. 2.6%) were observed during treatment with difelikefalin.",
    "title": "Real-world use of difelikefalin in hemodialysis patients at a large dialysis organization in the United States: a retrospective database study.",
    "xml": "<Element 'PubmedArticle' at 0x788503031210>"
}