A cumulative dose response study for the comparison of the effect of inhalation of two dose sequences of fenoterol inhalation powder.

The effect of inhalation of two dose sequences of fenoterol inhalation powder were compared in a double-blind cumulative dose response investigation. Nine patients with stable asthma participated in the study. In dose sequence I, 50 + 50 + 100 + 200 micrograms of fenoterol powder were inhaled and in dose sequence II, 200 + 50 + 50 + 50 micrograms fenoterol inhalation powder. There was no significant difference in the effect on lung function or tremor at any point following the two methods of inhalation.