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Antimicrobial Agents and Chemotherapy, Mar 1995, 650-655, Vol 39, No. 3
DP Nicolau, CD Freeman, PP Belliveau, CH Nightingale, JW Ross and R Quintiliani
Once-daily aminoglycoside (ODA) regimens have been instituted to maximize
bacterial killing by optimizing the peak concentration/MIC ratio and to
reduce the potential for toxicity. We initiated an ODA program at our
institution that utilizes a fixed 7-mg/kg intravenous dose with a drug
administration interval based on estimated creatinine clearance: > or =
60 ml/min every 24 h (q24h), 59 to 40 ml/min q36h, and 39 to 20 ml/min
q48h. Subsequent interval adjustments are made by using a single
concentration in serum and a nomogram designed for monitoring of ODA
therapy. Since initiation of the program, 2,184 patients have received this
ODA regimen. The median dose was 450 (range, 200 to 925) mg, while the
median length of therapy was 3 (range, 1 to 26) days. The median age of the
population was 46 (range, 13 to 97) years. Gentamicin accounted for 94% of
the aminoglycoside use, and the majority (77%) of patients received the
drug q24h. The 36- , 48-, and > 48-h intervals were used for 15, 6, and
2% of this population, respectively. Three patients exhibited clinically
apparent ototoxicity. Twenty-seven patients (1.2%) developed nephrotoxicity
(the Hartford Hospital historical rate is approximately 3 to 5%) after a
median of 7 (range, 3 to 19) days of therapy. On the basis of a prospective
evaluation of 58 patients and follow-up of additional patients via
clinician reports, we have noted no apparent alterations in clinical
response with our ODA program. This ODA program appears to be clinically
effective, reduces the incidence of nephrotoxicity, and provides a
cost-effective method for administration of aminoglycosides by reducing
ancillary service time and serum aminoglycoside determinations.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Experience with a once-daily aminoglycoside program administered to 2,184 adult patients
Department of Pharmacy, Hartford Hospital, Connecticut 06102, USA.
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