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- W2110937140 abstract "We examined whether a pretreatment with formoterol, oxitropium bromide, or salmeterol might modify the dose-response curves to inhaled salbutamol in patients with stable and partially reversible chronic obstructive pulmonary disease (COPD). Sixteen outpatients with partially reversible, stable COPD received 24 microg formoterol, 50 microg salmeterol, 200 microg oxitropium bromide, or placebo on four non-consecutive days. Spirometric testing was performed immediately before inhalation of treatment and after 2 h. A dose-response curve to inhaled salbutamol was then constructed using doses of 100, 100, 200 microg and 400 microg--that is, a total cumulative dose of 800 microg. Dose increments were given at 20 min intervals with measurements being made 15 min after each dose. Formoterol, salmeterol, or oxitropium bromide elicited a significant increase in forced expiratory volume in one second (FEV1) compared with placebo (mean differences (L) = placebo 0.05; formoterol 0.34; salmeterol 0.27; oxitropium bromide 0.23). Dose-dependent increases in FEV1 were seen (mean values (L) before salbutamol and after a cumulative dose of 100, 200, 400, and 800 microg = placebo: 1.06, 1.28, 1.35, 1.39, 1.41; formoterol: 1.33, 1.37, 1.41, 1.44, 1.44; salmeterol: 1.30, 1.33, 1.36, 1.39, 1.42; oxitropium bromide: 1.27, 1.34, 1.37, 1.41, 1.40). Statistical analysis revealed no significant differences in FEV1 and forced vital capacity (FVC) responses to salbutamol after therapy with formoterol, salmeterol, or oxitropium bromide compared with placebo. This study clearly shows that a pretreatment with a conventional dose of formoterol, salmeterol, or oxitropium bromide does not preclude the possibility of inducing a further bronchodilation with salbutamol in patients suffering from partially reversible chronic obstructive pulmonary disease." @default.
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- W2110937140 date "1998-06-01" @default.
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- W2110937140 title "Effects of formoterol, salmeterol or oxitropium bromide on airway responses to salbutamol in COPD" @default.
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- W2110937140 doi "https://doi.org/10.1183/09031936.98.11061337" @default.
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