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Related Experiment Videos

Tobramycin levels in human eyes.

F P Furgiuele, J P Smith, J G Baron

    American Journal of Ophthalmology
    |January 1, 1978
    PubMed
    Summary

    This study shows that tobramycin, an antibiotic, reaches therapeutic levels in the human eye's aqueous humor after systemic or subconjunctival administration. It is effective against common eye infection bacteria with no observed adverse effects.

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    Area of Science:

    • Ophthalmology
    • Pharmacology
    • Infectious Diseases

    Background:

    • Aminoglycoside antibiotics are crucial for treating bacterial infections.
    • Ocular infections require effective antimicrobial penetration into the eye.
    • Tobramycin is a potent aminoglycoside with potential ophthalmic applications.

    Purpose of the Study:

    • To evaluate the penetration of tobramycin into the aqueous humor following parenteral administration.
    • To determine if subconjunctival tobramycin achieves therapeutic concentrations in the aqueous humor.
    • To assess the safety and efficacy of tobramycin for treating ocular infections.

    Main Methods:

    • Parenteral administration (intramuscular or intravenous) of tobramycin in 36 cataract patients.
    • Subconjunctival administration of tobramycin in eyes with a normal blood-aqueous barrier.
    • Measurement of tobramycin levels in aqueous humor.
    • Assessment for any adverse effects.

    Main Results:

    • Tobramycin penetrated the aqueous humor after parenteral administration in patients with a normal blood-aqueous barrier.
    • Subconjunctival tobramycin achieved therapeutic aqueous humor levels exceeding the minimum inhibitory concentration (MIC) for Pseudomonas and Staphylococcus.
    • No adverse effects were reported in the study subjects.

    Conclusions:

    • Tobramycin demonstrates effective penetration into the human aqueous humor.
    • Subconjunctival tobramycin is a viable option for achieving therapeutic drug levels in the eye.
    • Tobramycin shows promise for the treatment of acute ocular infections due to its efficacy and safety profile.

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