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Chest, Vol 89, 394-397, Copyright © 1986 by American College of Chest Physicians

ARTICLES

Optimal dose of fenoterol by metered-dose inhaler in asthmatic adults

SA Conrad, RW Light and RB George

Three doses of fenoterol were administered by metered-dose inhaler to 20 adult subjects with asthma in order to determine the optimal dose for routine administration. Inhaled doses of 100 micrograms, 200 micrograms, and 400 micrograms of fenoterol with isoproterenol and placebo controls were administered in a randomized double-blind crossover regimen. We found that 200 micrograms of fenoterol by metered- dose inhaler produced a longer duration of action, greater peak response, and greater overall time-weighted responses in the forced expiratory volume in one second, in the mean forced expiratory flow during the middle half of the forced vital capacity, and in airway resistance than did the other drug regimens. The 400 micrograms dose of fenoterol produced no increase in response over that seen after the 200 micrograms dose. Side effects were minimal and no greater than with isoproterenol.




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Copyright © 1986 by the American College of Chest Physicians.