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- W1965600709 abstract "To assess the utility of a dose-titration scheme for determining maintenance theophylline requirements, dose requirements and stability of serum concentrations were examined using 3537 serum determinations from 1073 patients with chronic asthma during a 5-year period. When the dosing scheme was followed, 78% of initial serum concentrations were within the target range of 10 to 20 micrograms/ml; the mean number of measurements to attain this range was 1.3. Among 404 of these patients prospectively questioned, adverse effects were not present in all 41 whose initial serum concentration was less than 10 micrograms/ml, occurred in eight of 296 patients when serum concentrations were between 10 and 20 micrograms/ml, and were present in 21 of 67 when concentrations were greater than 20 micrograms/ml. After final dose adjustment, mean dose requirements among those who attained serum concentrations of 10 to 20 micrograms/ml averaged 22 mg/kg/day in 1- to 9-year-old children, 20 mg/kg/day in 9- to 12-year-old children, 18 mg/kg/day in 12- to 16 year-old children, and 13 mg/kg/day in the 94 patients older than 16 years of age. Repeat serum concentrations after 3 months to 2 years showed 66% remaining within the 10 to 20 micrograms/ml range and another 15% between 7.5 and 10 micrograms/ml; 9% were greater than 20 micrograms/ml, and none greater than 30 micrograms/ml. Thus the dosing scheme produces serum concentrations in the usual therapeutic range with a minimum of samples and few side effects; most patients maintained acceptably stable blood levels." @default.
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- W1965600709 date "1986-08-01" @default.
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- W1965600709 title "Evaluation of a scheme for establishing and maintaining dosage of theophylline in ambulatory patients with chronic asthma" @default.
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- W1965600709 doi "https://doi.org/10.1016/s0022-3476(86)80403-6" @default.
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