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Related Experiment Videos

Parenteral augmentin: pharmacokinetics.

D H Staniforth, D Jackson, R Horton

    International Journal of Clinical Pharmacology, Therapy, and Toxicology
    |August 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

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    This study examines how the body processes the antibiotic combination Augmentin when given intravenously. Researchers measured drug levels in the blood and urine of healthy volunteers to determine how quickly the medication is distributed and cleared. They also tested whether a second drug, probenecid, changes these levels. The findings confirm that both components of the antibiotic reach concentrations in the body that are high enough to effectively treat bacterial infections.

    Area of Science:

    • Pharmacokinetics research within clinical pharmacology
    • Parenteral augmentin drug disposition studies

    Background:

    Limited information exists regarding the precise movement of intravenous antibiotic combinations through human physiological systems. Prior research has shown that drug interactions can significantly alter the clearance rates of specific therapeutic agents. That uncertainty drove investigators to examine how the body processes this particular combination when administered directly into the bloodstream. No prior work had resolved whether the two components behave identically under varying delivery conditions. This gap motivated a detailed analysis of serum concentration profiles following different administration protocols. Researchers sought to clarify the distribution patterns of these substances using mathematical modeling techniques. Understanding these dynamics remains vital for optimizing dosing regimens in clinical settings. Establishing clear pharmacokinetic parameters helps clinicians ensure that patients receive effective treatment levels consistently.

    Purpose Of The Study:

    The study aims to characterize the pharmacokinetic profile of intravenous antibiotic combinations in healthy human volunteers. Researchers sought to determine how these substances distribute and clear from the body after administration. A primary objective involved testing the impact of probenecid on the serum levels of the active components. The team also intended to verify if current dosing regimens provide sufficient concentrations for therapeutic efficacy. This investigation addresses the need for precise data regarding drug behavior in a two-compartment model. By comparing bolus injections and infusions, the authors aimed to map the full kinetic trajectory of the medication. The motivation stems from a requirement to optimize antibiotic delivery for improved clinical outcomes. Establishing these parameters helps ensure that patients receive consistent and effective treatment dosages throughout their therapy.

    Keywords:
    intravenous antibioticamoxycillin clearanceclavulanic aciddrug interactionserum concentration

    Frequently Asked Questions

    The researchers propose that the drug follows a two-compartment model. Amoxycillin serum levels rise when probenecid is present, while clavulanic acid concentrations remain stable. Both substances reach peak levels exceeding therapeutic requirements after a thirty-minute infusion.

    The study utilizes probenecid to evaluate potential drug-drug interactions. This agent is known to inhibit renal tubular secretion, which the authors hypothesize explains the observed increase in amoxycillin serum concentrations during the crossover trial.

    A bolus injection of 1.2 grams was necessary to assess the baseline distribution kinetics in healthy volunteers. This specific dosage allowed the team to compare drug behavior with and without the presence of the interaction agent.

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    Main Methods:

    Review approach involves a crossover design to evaluate drug behavior in healthy human subjects. Eight participants received a bolus injection of 1.2 grams to establish baseline kinetic profiles. A separate group of eight volunteers underwent a thirty-minute infusion of 2.2 grams to assess peak levels. Investigators collected blood and urine samples at scheduled intervals to track substance concentration. Mathematical modeling categorized the movement of these agents into a two-compartment system. The team compared results from trials conducted with and without the addition of probenecid. This systematic strategy allowed for the isolation of specific drug interaction effects on clearance. Researchers calculated the final concentrations to verify if they surpassed established therapeutic thresholds.

    Main Results:

    Key findings from the literature indicate that the drug combination follows a two-compartment model during intravenous administration. Serum concentrations of amoxycillin increased significantly when participants received probenecid during the crossover trial. Conversely, the levels of clavulanic acid remained entirely unaffected by the presence of this interaction agent. Following a 2.2-gram infusion, peak levels for amoxycillin exceeded 100 micrograms/ml in the blood. Clavulanic acid reached peak concentrations of 14 micrograms/ml under the same infusion conditions. All measured serum and urinary levels stayed well above the concentrations required for therapeutic success. The data demonstrate that both components achieve effective systemic exposure regardless of the specific delivery method tested. These results confirm the reliability of the intravenous route for maintaining necessary antibiotic concentrations.

    Conclusions:

    Synthesis and implications suggest that the intravenous delivery of this antibiotic combination achieves robust serum concentrations. The data confirm that both active ingredients maintain levels well above the thresholds required for clinical efficacy. Probenecid specifically influences the clearance of amoxycillin, whereas clavulanic acid remains unaffected by this interaction. These findings imply that clinicians should account for such interactions when adjusting therapeutic protocols for patients. The observed two-compartment model effectively describes the distribution kinetics for both substances within the body. Measured concentrations at the end of infusion periods consistently exceeded the minimum requirements for bacterial inhibition. Future applications of these results could refine dosing strategies to maximize patient outcomes while minimizing potential drug-drug interference. The study provides a clear framework for understanding how these specific agents interact with physiological clearance mechanisms.

    The researchers used serum and urinary concentration data to map the drug's movement. These measurements are vital for calculating the clearance rates and distribution phases within the two-compartment model framework.

    Peak concentrations reached over 100 micrograms/ml for amoxycillin and 14 micrograms/ml for clavulanic acid. These values were recorded immediately following a 2.2-gram infusion lasting thirty minutes.

    The authors suggest that their findings support the use of this intravenous regimen for achieving therapeutic effects. They emphasize that the concentrations obtained remain consistently above the levels needed to combat bacterial pathogens.