Limits...
Single- and multiple-dose pharmacokinetics and absolute bioavailability of tedizolid.

Flanagan S, Fang E, Muñoz KA, Minassian SL, Prokocimer PG - Pharmacotherapy (2014)

Bottom Line: Treatment-related adverse events occurred in 41% of subjects.Most adverse events were related to infusion site and became more frequent with multiple dosing.These results from a population of healthy volunteers support once/day dosing of tedizolid phosphate 200 mg with both the oral and IV formulations, without the need for dose adjustment when switching administration routes.

View Article: PubMed Central - PubMed

Affiliation: Cubist, San Diego, California.

Show MeSH

Related in: MedlinePlus

Mean tedizolid plasma concentration after a single dose of intravenous (IV) tedizolid phosphate, plotted on a (A) linear or (B) log time scale (n=9, 9, 8, and 9 for 100-, 200-, 300-, and 400-mg doses, respectively). Postinfusion data from subjects with 1-hour infusions were offset by 1 hour to match postinfusion times of subjects having 2-hour infusions. Mean tedizolid plasma concentration after 7 days of IV tedizolid phosphate 200 mg/day, plotted on a (C) linear or (D) log time scale (n=8). Mean tedizolid plasma concentration after a single dose of IV or oral 200 mg tedizolid phosphate, plotted on a (E) linear or (F) log time scale (n=8). Error bars denote standard deviations.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4260119&req=5

fig03: Mean tedizolid plasma concentration after a single dose of intravenous (IV) tedizolid phosphate, plotted on a (A) linear or (B) log time scale (n=9, 9, 8, and 9 for 100-, 200-, 300-, and 400-mg doses, respectively). Postinfusion data from subjects with 1-hour infusions were offset by 1 hour to match postinfusion times of subjects having 2-hour infusions. Mean tedizolid plasma concentration after 7 days of IV tedizolid phosphate 200 mg/day, plotted on a (C) linear or (D) log time scale (n=8). Mean tedizolid plasma concentration after a single dose of IV or oral 200 mg tedizolid phosphate, plotted on a (E) linear or (F) log time scale (n=8). Error bars denote standard deviations.

Mentions: Tolerability and PK of tedizolid were similar for the three infusion regimens, reaching similar peak concentrations when infused in 250 or 500 ml over 2 hours or in 250 ml over 1 hour (data not shown), leading to the selection of the 250-ml 1-hour infusion for the multiple-dose and bioavailability portions of the study. Unlike levels of the prodrug, plasma tedizolid concentrations increased during the infusion and then reached a plateau (250-ml 1-hr infusion is shown in Figure2). Single doses of IV tedizolid phosphate produced dose-dependent increases in tedizolid (Figure3A, B). Mean tedizolid exposure parameters (AUC and Cmax) increased with ascending doses of tedizolid phosphate (Figure4). Median Tmax values for tedizolid were determined primarily by the length of infusion and ranged from 1.2–2.2 hours (Table2). Mean tedizolid t1/2 values ranged from 9.3–13.4 hours for all doses of tedizolid phosphate. There was a dose-dependent increase in the tedizolid Cmax (range 1.2–5.1 μg/ml) for increasing doses of tedizolid phosphate. Similar results were observed for mean AUC0–t and AUC0–∞. Mean apparent volume of distribution at steady state (Vdss) values ranged from 61.2–74.5 L across groups and were dose independent. Clearance values were generally similar, ranging from 4.8–5.8 L/hour, and also indicated dose independence.


Single- and multiple-dose pharmacokinetics and absolute bioavailability of tedizolid.

Flanagan S, Fang E, Muñoz KA, Minassian SL, Prokocimer PG - Pharmacotherapy (2014)

Mean tedizolid plasma concentration after a single dose of intravenous (IV) tedizolid phosphate, plotted on a (A) linear or (B) log time scale (n=9, 9, 8, and 9 for 100-, 200-, 300-, and 400-mg doses, respectively). Postinfusion data from subjects with 1-hour infusions were offset by 1 hour to match postinfusion times of subjects having 2-hour infusions. Mean tedizolid plasma concentration after 7 days of IV tedizolid phosphate 200 mg/day, plotted on a (C) linear or (D) log time scale (n=8). Mean tedizolid plasma concentration after a single dose of IV or oral 200 mg tedizolid phosphate, plotted on a (E) linear or (F) log time scale (n=8). Error bars denote standard deviations.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4260119&req=5

fig03: Mean tedizolid plasma concentration after a single dose of intravenous (IV) tedizolid phosphate, plotted on a (A) linear or (B) log time scale (n=9, 9, 8, and 9 for 100-, 200-, 300-, and 400-mg doses, respectively). Postinfusion data from subjects with 1-hour infusions were offset by 1 hour to match postinfusion times of subjects having 2-hour infusions. Mean tedizolid plasma concentration after 7 days of IV tedizolid phosphate 200 mg/day, plotted on a (C) linear or (D) log time scale (n=8). Mean tedizolid plasma concentration after a single dose of IV or oral 200 mg tedizolid phosphate, plotted on a (E) linear or (F) log time scale (n=8). Error bars denote standard deviations.
Mentions: Tolerability and PK of tedizolid were similar for the three infusion regimens, reaching similar peak concentrations when infused in 250 or 500 ml over 2 hours or in 250 ml over 1 hour (data not shown), leading to the selection of the 250-ml 1-hour infusion for the multiple-dose and bioavailability portions of the study. Unlike levels of the prodrug, plasma tedizolid concentrations increased during the infusion and then reached a plateau (250-ml 1-hr infusion is shown in Figure2). Single doses of IV tedizolid phosphate produced dose-dependent increases in tedizolid (Figure3A, B). Mean tedizolid exposure parameters (AUC and Cmax) increased with ascending doses of tedizolid phosphate (Figure4). Median Tmax values for tedizolid were determined primarily by the length of infusion and ranged from 1.2–2.2 hours (Table2). Mean tedizolid t1/2 values ranged from 9.3–13.4 hours for all doses of tedizolid phosphate. There was a dose-dependent increase in the tedizolid Cmax (range 1.2–5.1 μg/ml) for increasing doses of tedizolid phosphate. Similar results were observed for mean AUC0–t and AUC0–∞. Mean apparent volume of distribution at steady state (Vdss) values ranged from 61.2–74.5 L across groups and were dose independent. Clearance values were generally similar, ranging from 4.8–5.8 L/hour, and also indicated dose independence.

Bottom Line: Treatment-related adverse events occurred in 41% of subjects.Most adverse events were related to infusion site and became more frequent with multiple dosing.These results from a population of healthy volunteers support once/day dosing of tedizolid phosphate 200 mg with both the oral and IV formulations, without the need for dose adjustment when switching administration routes.

View Article: PubMed Central - PubMed

Affiliation: Cubist, San Diego, California.

Show MeSH
Related in: MedlinePlus