Healthcare utilization and costs with fixed-source versus variable-source tacrolimus in patients receiving a kidney transplant

Journal of Medical Economics
Suvapun BunniranJames Spalding

Abstract

Switching drug manufacturers in transplant patients may require an increased intensity of therapeutic monitoring, leading to additional healthcare visits, associated laboratory tests, and perhaps hospitalizations. As real-world studies examining the interchangeability of tacrolimus from different manufacturers are limited, the purpose of this study was to examine the healthcare resource utilization (HRU) and economic impact of tacrolimus-switching in kidney transplantation. This cross-sectional, retrospective study examined HRU and healthcare costs (HCCs) among patients with a kidney transplant who were prescribed tacrolimus from fixed-source (FS) vs variable-source (VS) manufacturers using claims data from the large US health plan Humana from October 1, 2012, to December 31, 2013. Overall, 1,024 patients were identified (FS: n = 674, 66%; VS: n = 350, 34%). The number of therapeutic drug monitoring (TDM) events for the VS group was 13% greater than for the FS group after controlling for demographics, comorbidity score, and number of medications (incidence rate ratio = 1.13, p = .033). Adjusted total HCCs were 9% lower for VS (US$28,054 vs US$30,823, p = .045). In the unadjusted analysis, VS had greater emergency department (ED...Continue Reading

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