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PubMed · 4000042

Plasma warfarin concentrations after a massive overdose.

L P Hackett·K F Ilett·A Chester
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Abstract

The plasma pharmacokinetics of warfarin were studied in a patient who took an overdose of warfarin (2000 mg by mouth), together with 25 X 10(4) units of heparin administered subcutaneously. The plasma warfarin level fell rapidly (half-life, 21.7 h), and there was no convincing evidence for dose-dependency in its disposition.

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HeparinHumansInjections, SubcutaneousKineticsMaleMiddle AgedWarfarinCase ReportsJournal Article

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L P Hackett, K F Ilett, A Chester. 1985-06-10. Plasma warfarin concentrations after a massive overdose.. https://doi.org/10.5694/j.1326-5377.1985.tb113560.x

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Novel Pluronic/heparin composite nanocapsules that exhibit a thermally responsible swelling and deswelling behavior were synthesized. Pluronic F-127 preactivated with p-nitrophenyl chloroformate at its two terminal hydroxyl groups was dissolved in a methylene chloride phase. The organic phase was dispersed in an aqueous phase containing heparin. At an organic/aqueous interface, Pluronic-cross-linked heparin nanocapsules were produced. They exhibited a 1000-fold volume transition (ca. 336 nm at 25 degrees C; ca. 32 nm at 37 degrees C), and a reversible swelling and deswelling behavior when the temperature was cycled between 20 and 37 degrees C. The reversible volume transition of Pluronic nanocapsules was caused by micellization and demicellization of cross-linked Pluronic polymer chains within the nanocapsule structure in response to temperature. The morphological characters were investigated with transmission electron microscopy and small angle neutron scattering. Pluronic/heparin nanocapsules had an aqueous fluid-filled hollow interior with a surrounding shell layer below the critical temperature, but they became a collapsed core/shell structure similar to that of Pluronic micelles above it.

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