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  • Title: Pharmacokinetics, Safety, and Tolerability of Tedizolid Phosphate After Single-dose Administration in Healthy Korean Male Subjects.
    Author: Kim Y, Kim A, Lee S, Choi SH, Lee DY, Song JS, Lee H, Jang IJ, Yu KS.
    Journal: Clin Ther; 2017 Sep; 39(9):1849-1857. PubMed ID: 28865799.
    Abstract:
    PURPOSE: Tedizolid phosphate is a next-generation oxazolidinone prodrug that is transformed into the active moiety tedizolid. Its indication is acute bacterial skin and skin structure infections caused by gram-positive species, including methicillin-resistant Staphylococcus aureus. Although tedizolid phosphate has been marketed in Korea, no data on the pharmacokinetic (PK) properties or tolerability of tedizolid phosphate in Korean subjects are available. This study was designed to evaluate the PK properties, oral bioavailability, and tolerability with a single-dose oral and intravenous administration of tedizolid phosphate in healthy Korean male subjects. METHODS: A block-randomized, double-blind, placebo-controlled, single-dose study was conducted in 3 groups (200, 400, and 600 mg; 10 subjects in each group). In the second part of the study, subjects from the 200-mg group received administration orally and intravenously (1-hour infusion) via 2-way crossover for the evaluation of absolute bioavailability. There was a 7-day washout period between treatments in the absolute bioavailability part of the study. Serial blood samples for PK analysis were collected for up to 72 hours. Tolerability was assessed by analysis of adverse events. FINDINGS: Thirty healthy Korean subjects completed the study and were included in the PK and tolerability analyses. Tedizolid phosphate was rapidly converted into tedizolid. After a single oral dose, the Tmax of tedizolid was observed to be 1.5 to 2.5 hours, and the plasma concentration-time curve of tedizolid showed a 2-phase elimination pattern, with a half-life of ~11 hours. Dose-dependent increases were observed in the AUClast value (29,441-78,062 μg · h/L) and in the Cmax value (2679-6980 μg/L) with the administration of tedizolid phosphate 200 to 600 mg PO. The absolute bioavailability of tedizolid was 95.2% (90% CI, 92.7%-97.8%) in the 200-mg administration group. There were no serious adverse events or clinically significant changes in the tolerability assessment. IMPLICATIONS: Tedizolid phosphate at doses of up to 600 mg was well-tolerated in these healthy Korean male subjects. Tedizolid shows dose linearity with oral administration, and no dose adjustment of tedizolid phosphate 200 mg would be needed when switching administration routes. ClinicalTrials.gov identifier: NCT02097043.
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