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Clinical Trial
Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Efficacy, tolerance, and pharmacokinetics of once daily tobramycin for pseudomonas exacerbations in cystic fibrosis.
Archives of Disease in Childhood 1998 June
OBJECTIVE: To compare once daily with thrice daily tobramycin for treatment of Pseudomonas aeruginosa infection in patients with cystic fibrosis.
DESIGN: 22 patients with cystic fibrosis, mean (SD) age 11 (3.4) years (range 5.6-19.3), with pulmonary pseudomonas exacerbations were randomly assigned to receive a 14 day course of tobramycin (15 mg/kg/day) either in three infusions (group A) (n = 10) or a single daily infusion (group B) (n = 12), combined with ceftazidime (200 mg/kg/day as three intravenous injections). Efficacy was assessed by comparison of pulmonary, nutritional, and inflammatory indices on days 1 and 14. Cochlear and renal tolerance were assessed on days 1 and 14. Tobramycin concentration was measured in serum and sputum 1, 2, 3, 4, 8, and 24 hours after the start of the infusion. Analysis was by non-parametric Wilcoxon test.
RESULTS: Variables improving (p < 0.05) in both groups A and B were, respectively: weight/height (+4% and +3.1%), plasma prealbumin (+66 and +63 mg/l), forced vital capacity (FVC) (+14% and +11%), forced expiratory volume in one second (+15% and +14%), and forced expiratory flow between 25% and 75% of FVC (+13% and +21%). Improvement was not significantly different between groups. Renal and cochlear indices remained within the normal range. Serum peak concentration of tobramycin on day 1 was 13.2 (7.1) mg/l in group A and 42.5 (11.2) mg/l in group B (p < 0.001); serum trough was 1.1 (0.8) mg/l in group A and 0.3 (0.2) mg/l in group B (p < 0.01). Tobramycin concentrations in sputum were two to three times higher in group B than group A.
CONCLUSIONS: Once daily tobramycin combined with three injections of ceftazidime is safe and effective for the treatment of pseudomonas exacerbations in cystic fibrosis patients.
DESIGN: 22 patients with cystic fibrosis, mean (SD) age 11 (3.4) years (range 5.6-19.3), with pulmonary pseudomonas exacerbations were randomly assigned to receive a 14 day course of tobramycin (15 mg/kg/day) either in three infusions (group A) (n = 10) or a single daily infusion (group B) (n = 12), combined with ceftazidime (200 mg/kg/day as three intravenous injections). Efficacy was assessed by comparison of pulmonary, nutritional, and inflammatory indices on days 1 and 14. Cochlear and renal tolerance were assessed on days 1 and 14. Tobramycin concentration was measured in serum and sputum 1, 2, 3, 4, 8, and 24 hours after the start of the infusion. Analysis was by non-parametric Wilcoxon test.
RESULTS: Variables improving (p < 0.05) in both groups A and B were, respectively: weight/height (+4% and +3.1%), plasma prealbumin (+66 and +63 mg/l), forced vital capacity (FVC) (+14% and +11%), forced expiratory volume in one second (+15% and +14%), and forced expiratory flow between 25% and 75% of FVC (+13% and +21%). Improvement was not significantly different between groups. Renal and cochlear indices remained within the normal range. Serum peak concentration of tobramycin on day 1 was 13.2 (7.1) mg/l in group A and 42.5 (11.2) mg/l in group B (p < 0.001); serum trough was 1.1 (0.8) mg/l in group A and 0.3 (0.2) mg/l in group B (p < 0.01). Tobramycin concentrations in sputum were two to three times higher in group B than group A.
CONCLUSIONS: Once daily tobramycin combined with three injections of ceftazidime is safe and effective for the treatment of pseudomonas exacerbations in cystic fibrosis patients.
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