Defibrotide - Pharmacokinetics


Defibrotide is available as an oral, intravenous, and intramuscular formulation. Its oral bioavailability is in the range of 58-70% of the parenteral forms. T1/2 alpha is in the range of minutes while T1/2 beta is in the range of hours in studies with oral radiolabelled defibrotide. These data suggest that defibrotide, in spite of its macromolecular nature, is absorbed well after oral administration. Due to the drug's short half-life, it is necessary to give the daily dose divided in 2 to 4 doses (see below).

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