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Summary
A single-blind, crossover study was carried out in 43 asthmatic patients to compare the efficacy and tolerance of inhaled ipratropium bromide with inhaled salbutamol. One or other drug was given 3-times daily (0.04 mg ipratropium bromide or 0.2 mg salbutamol per dose) over a period of 4 weeks. Patients were then crossed over to the alternative medication for a further 4 weeks. The results of lung function tests performed at routine clinic visits and by the patients at home showed similar increases in peak flow and spirometry recordings, although more patients expressed a preference for salbutamol. Unwanted effects were minor with both drugs. It is suggested, therefore, that ipratropium bromide may be a useful alternative to beta-stimulants in some asthmatics.