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DicloxacillinIn Vitro and Pharmacologic Comparisons With Oxacillin and Cloxacillin
CHARLES F. GRAVENKEMPER, MD;
JOHN V. BENNETT, MD;
JEAN L. BRODIE, BS;
WILLIAM M. M. KIRBY, MD
Arch Intern Med. 1965;116(3):340-345.
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THE ISOXAZOLYL group of semisynthetic penicillins has been useful in the oral therapy of infections caused by penicillinase-producing staphylococci. Cloxacillin, which is available for general use in Great Britain instead of oxacillin, has in vitro activity similar to oxacillin against the common gram-positive pathogens and is superior to oxacillin in regard to blood levels obtained after oral and intramuscular administration.1-4 Another new isoxazolyl penicillin, dicloxacillin, appears to give even higher blood levels than cloxacillin, and the present report compares various in vitro and pharmacologic properties of dicloxacillin with those of oxacillin and cloxacillin.
Materials and Methods
Cloxacillin and dicloxacillin were supplied as the sodium monohydrate salt in 250 mg capsules and oxacillin as the sodium salt in 500 mg capsules, for oral administration.
Susceptibility testing with standard powders of oxacillin, cloxacillin, and dicloxacillin was performed by a tube dilution method3 for at least ten recently isolated strains each
. . . [Full Text PDF of this Article]
Author Affiliations
SEATTLE
From the Department of Medicine, University of Washington School of Medicine. Trainees in Infectious Diseases (Drs. Gravenkemper and Bennett); Technologist (Miss Brodie); and Professor of Medicine (Dr. Kirby).
Footnotes
Received for publication Dec 31, 1964; accepted Feb 3, 1965.
Reprint requests to University of Washington School of Medicine, Seattle, Wash 98105 (Dr. Kirby).
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