Abstract:
Introduction:To achieve target concentrations, the application of higher-than-standard doses of amikacin is proposed for the treatment of sepsis due to an increase in volume of distribution and clearance, but little data are available on aminoglycoside administration in critically ill elderly patients. Patients and methods:Forty critically ill elderly patients (aged over 65 years) who required amikacin therapy due to severe documented, or suspected gram-negative infections, were randomly assigned to two treatment groups. Group A (20 patients) received 15 mg/kg amikacin and Group B (20 patients) received 25 mg/kg amikacin per day as a single daily dose. All the patients were monitored for renal damage by the daily monitoring of serum creatinine. The amikacin peak (Cmax) and trough (Cmin) serum concentrations were measured on Days 3 and 7 postadministration. Results:Data from 18 patients in Group A and 15 patients in Group B were finally analyzed. On Day 3, the amikacin mean Cmax levels in the standard and high-dose treatment groups were 30.4±11 and 52.3±16.1 µg/mL (P<0.001), and the Cmin levels were 3.2±2.1 and 5.2±2.8 µg/mL, respectively (P=0.035). On Day 7, the Cmax levels in the standard and high-dose groups were 33±7.3 and 60.0±17.6 µg/mL (P=0.001), and the Cmin levels were 3.2±2.9 and 9.3±5.6 µg/mL, respectively (P=0.002). In only six (40%) of the patients in the high-dose groups and none of the patients in the standard-dose group, amikacin Cmax reached the target levels (>64 µg/mL), whereas the amikacin mean Cmin levels in the high-dose group were above the threshold of toxicity (5 µg/mL). Conclusion:Our results suggest that the optimum dose of amikacin should be determined for elderly critically ill patients. It seems that higher-than-standard doses of amikacin with more extended intervals might be more appropriate than standard once-daily dosing in the elderly critically ill patients.
journal_name
Infect Drug Resistjournal_title
Infection and drug resistanceauthors
Sadeghi K,Hamishehkar H,Najmeddin F,Ahmadi A,Hazrati E,Honarmand H,Mojtahedzadeh Mdoi
10.2147/IDR.S150839subject
Has Abstractpub_date
2018-02-13 00:00:00pages
223-228issn
1178-6973pii
idr-11-223journal_volume
11pub_type
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