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  • Title: The effect for hyperuricemia inpatient of uric acid overproduction type or in combination with topiroxostat on the pharmacokinetics, pharmacodynamics and safety of dotinurad, a selective urate reabsorption inhibitor.
    Author: Okui D, Sasaki T, Fushimi M, Ohashi T.
    Journal: Clin Exp Nephrol; 2020 Mar; 24(Suppl 1):92-102. PubMed ID: 31734820.
    Abstract:
    BACKGROUND: Dotinurad, a novel selective urate reabsorption inhibitor (SURI), increases urinary uric acid excretion. The aim of this study is to examine the pharmacokinetics, pharmacodynamics, and safety of dotinurad according to the type of hyperuricemia, with or without concomitant use of xanthine oxidase inhibitor, in uric acid "overproduction type" patients. METHODS: This open-label clinical pharmacology study was conducted in a hospital. Dotinurad 1 mg was administered for 7 days to hyperuricemic patients with uric acid "overproduction type" (overproduction group, n = 6; and combination group, n = 6) and uric acid "underexcretion type" (underexcretion group, n = 6). In the combination group, topiroxostat 80 mg was used concomitantly. RESULTS: No significant differences were observed in pharmacokinetics and safety between overproduction group and underexcretion group, and the percent change in serum uric acid level and the amount of urinary uric acid excretion after administration were comparable. In "overproduction type" patients of combination group, the percent change in serum uric acid level significantly increased and the amount of urinary uric acid excretion significantly decreased compared to those of overproduction group. No clinically meaningful differences were observed in safety between the overproduction group and the combination group. CONCLUSION: In inpatients, differences in hyperuricemic type did not significantly influence the pharmacokinetics, pharmacodynamics, and safety of dotinurad. Moreover, in "overproduction type", the coadministration of dotinurad and topiroxostat had an add-on serum uric acid lowering effect and suppressed urinary uric acid excretion. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT02837198.
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