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Related Experiment Videos

Prednisolone bioavailability in the dog

F L Tse, P G Welling

    Journal of Pharmaceutical Sciences
    |December 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Prednisolone absorption varied by formulation in dogs. Oral absorption was best from a slurry, suggesting formulation impacts drug bioavailability.

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    Area of Science:

    • Pharmacology
    • Veterinary Medicine
    • Drug Delivery

    Background:

    • Prednisolone is a widely used corticosteroid with variable oral bioavailability.
    • Understanding drug formulation effects on absorption is crucial for optimizing therapeutic outcomes.

    Purpose of the Study:

    • To evaluate the bioavailability and pharmacokinetics of prednisolone in a fasted dog model.
    • To compare absorption rates of prednisolone from different oral formulations (tablets, slurry, sodium phosphate solution).

    Main Methods:

    • Administered prednisolone via intravenous injection and oral dosing in dogs.
    • Tested oral formulations included prednisolone tablets, a slurry, and a prednisolone sodium phosphate solution.
    • Analyzed drug concentrations to determine pharmacokinetic parameters and bioavailability.

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    Main Results:

    • Hydrolysis of prednisolone sodium phosphate to prednisolone was rapid and complete.
    • Enteral absorption was significantly superior from the prednisolone slurry compared to tablets and the solution.
    • Reduced absorption from tablets was linked to disintegration, and from the solution to ionization and poor membrane permeability.

    Conclusions:

    • Drug formulation significantly impacts oral prednisolone absorption in dogs.
    • Prednisolone slurry demonstrated superior enteral absorption, suggesting potential for improved bioavailability.
    • Findings in this animal model may inform future human studies on prednisolone delivery.