Flint K C, Hockley B, Johnson N M
Postgrad Med J. 1983 Nov;59(697):724-5. doi: 10.1136/pgmj.59.697.724.
The efficacy of a single metered dose inhaler containing a combination of fenoterol (100 micrograms/puff) and ipratropium bromide (40 micrograms/puff) has been assessed in 12 asthmatics. We conclude that the bronchodilator effect of 2 puffs of the combination inhaler was significantly greater than that achieved by 2 puffs of salbutamol (100 micrograms/puff).