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Progressive improvements in patient-reported outcomes with the high-concentration capsaicin patch: a retrospective cohort study in patients with painful diabetic peripheral neuropathy (CASPAR study)

Objective - To assess long-term outcomes and tolerability associated with repeated topical high-concentration capsaicin patch (HCCP) treatments in painful diabetic peripheral neuropathy (pDPN). - Methods - CASPAR, a retrospective, non-interventional cohort study of HCCP for neuropathic pain, utilize...

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Main Authors: Überall, Michael A. (Author) , Kender, Zoltán (Author) , Quandel, Tamara (Author) , Engelen, Sylvia (Author) , Guerra, Lucia Garcia (Author) , Fajri, Tawfik (Author) , Allen, Samuel M. (Author) , Freitas, Rita L. (Author) , Eerdekens, Mariëlle H. (Author)
Format: Article (Journal)
Language:English
Published: September 2025
In: Journal of diabetes and its complications
Year: 2025, Volume: 39, Issue: 9, Pages: 1-10
ISSN:1873-460X
DOI:10.1016/j.jdiacomp.2025.109085
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.jdiacomp.2025.109085
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S1056872725001382
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Author Notes:Michael A. Überall, Zoltan Kender, Tamara Quandel, Sylvia Engelen, Lucia Garcia Guerra, Tawfik Fajri, Samuel M. Allen, Rita L. Freitas, Mariëlle H. Eerdekens
Description
Summary:Objective - To assess long-term outcomes and tolerability associated with repeated topical high-concentration capsaicin patch (HCCP) treatments in painful diabetic peripheral neuropathy (pDPN). - Methods - CASPAR, a retrospective, non-interventional cohort study of HCCP for neuropathic pain, utilizes real-world data from the German Pain e-Registry. This analysis included 826 patients with pDPN of the hands, feet, or legs receiving ≥1 HCCP with ≥12 months of follow-up. - Results - Significant reductions in 24-ho average pain intensity (API) were seen at baseline to Month 3 (mean 57.5 vs 42.4). Successive treatments generated further improvements; these were lost upon HCCP discontinuation. Patients receiving four HCCPs had a mean API decrease from 59.0 (baseline) to 16.0 (Month 12). A ≥30 % API decrease was achieved at Month 12 in 98.9 %, 90.8 %, 67.7 %, and 22.0 % of patients receiving four, three, two, or one HCCP, respectively. Improvements were observed across sleep, QoL, mood, daily activities, and concomitant pain medication use, with the greatest benefits for patients receiving four HCCPs. Results were consistent across treatment locations. Safety and tolerability aligned with the well-established profile for HCCP, consisting of local application-site reactions. - Conclusion - HCCP is a non-systemic treatment for pDPN associated with increasing improvements in neuropathic pain, sleep, mood, and QoL with successive treatments.
Item Description:Online verfügbar: 22. Mai 2025, Artikelversion: 10. Juni 2025
Gesehen am 24.10.2025
Physical Description:Online Resource
ISSN:1873-460X
DOI:10.1016/j.jdiacomp.2025.109085

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