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Related Experiment Videos

Piromidic acid and its ethylic ester: absorption, distribution, excretion

S Rosini, D Benetti

    International Urology and Nephrology
    |January 1, 1976
    PubMed
    Summary

    Piromidic acid ethyl ester showed better absorption and higher concentrations in rats than piromidic acid. This ester also resulted in significant antimicrobial activity in urine and bile.

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    Area of Science:

    • Pharmacokinetics
    • Drug Metabolism
    • Antimicrobial Agents

    Background:

    • Piromidic acid is a quinolone antibiotic.
    • Understanding the pharmacokinetic profile of piromidic acid and its derivatives is crucial for optimizing therapeutic efficacy.
    • The ethyl ester form may offer improved bioavailability.

    Purpose of the Study:

    • To compare the absorption, distribution, and excretion of piromidic acid and its ethyl ester in rats.
    • To evaluate the impact of esterification on the pharmacokinetic properties and antimicrobial activity of piromidic acid.

    Main Methods:

    • Oral administration of piromidic acid and its ethyl ester to rats.
    • Measurement of drug concentrations in blood and tissues.
    • Analysis of antimicrobial activity in urine and bile samples.

    Main Results:

    • The ethyl ester was well absorbed orally and hydrolyzed to piromidic acid.
    • Higher blood and tissue concentrations of piromidic acid were achieved with the ethyl ester compared to the parent compound.
    • Antimicrobial activity was detected in urine and bile samples.

    Conclusions:

    • Esterification of piromidic acid to its ethyl ester enhances oral absorption and systemic exposure in rats.
    • The ethyl ester is a promising prodrug for piromidic acid, potentially leading to improved therapeutic outcomes.
    • Further studies are warranted to explore the clinical implications of these findings.

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