Abstract
Ipratropium bromide (0.5 mg) and fenoterol (2 mg) produced equivalent peak bronchodilatation between 1 and 2 h after administration to eight patients with chronic partially reversible airways obstruction. The duration of action compared with saline was 6 h for ipratropium and 4 h for fenoterol. Both drugs in combination produced greater bronchodilatation than either drug alone. The increase in FVC was disproportionately greater than FEV1 with both drugs and saline, suggesting relief of obstruction of small airways.
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Selected References
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