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Related Experiment Videos

Gentamicin and ticarcillin serum levels.

J Murillo, H C Standiford, S C Schimpff

    JAMA
    |June 1, 1979
    PubMed
    Summary
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    Combining ticarcillin with gentamicin resulted in lower gentamicin and ticarcillin serum levels compared to other combinations. Monitoring antibiotic levels, especially gentamicin, is crucial for effective treatment of serious infections.

    Area of Science:

    • Pharmacology
    • Clinical Pharmacy
    • Infectious Diseases

    Background:

    • Antibiotic combinations are frequently used for serious infections.
    • Understanding drug interactions and their impact on serum levels is vital for therapeutic efficacy.
    • Ticarcillin disodium and gentamicin sulfate are commonly used antibiotics.

    Purpose of the Study:

    • To compare serum levels of ticarcillin disodium and gentamicin sulfate when administered intravenously in combination with either cephalothin sodium or alone.
    • To assess the clinical significance of observed antibiotic serum levels in patients with serious infections.

    Main Methods:

    • Serum concentrations of ticarcillin disodium and gentamicin sulfate were measured at one and five hours post-intravenous administration.
    • Patients were divided into groups receiving different antibiotic combinations: ticarcillin plus gentamicin, cephalothin plus gentamicin, and ticarcillin plus cephalothin.

    Related Experiment Videos

  • Statistical analysis was performed to compare mean drug levels between groups.

    • Main Results:

    • Patients receiving ticarcillin plus gentamicin showed significantly lower mean gentamicin levels at one and five hours compared to those receiving cephalothin plus gentamicin.
    • Serum ticarcillin levels were significantly lower five hours after administration in patients receiving ticarcillin plus gentamicin compared to those receiving ticarcillin plus cephalothin.
    • These findings suggest potential sub-therapeutic antibiotic levels in certain combination therapies.

    Conclusions:

    • The combination of ticarcillin and gentamicin may lead to lower serum concentrations of both drugs compared to other combinations.
    • Low antibiotic serum levels, particularly for aminoglycosides like gentamicin, can have clinical significance in treating serious infections.
    • Therapeutic drug monitoring, including serum concentration determination, is recommended for optimizing antimicrobial therapy, even in patients with normal renal function, when using antibiotic combinations.