Title : Bronchodilator subsensitivity after chronic dosing with eformoterol in patients with asthma.

Pub. Date : 1994 Jul

PMID : 7913292






3 Functional Relationships(s)
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1 PURPOSE: The aim of the present study was to evaluate in vivo and in vitro beta 2-adrenoceptor responsiveness after chronic inhaled therapy with the long-acting beta 2-agonist eformoterol or placebo, given twice daily, in patients with mild to moderate asthma. Formoterol Fumarate potassium calcium-activated channel subfamily M regulatory beta subunit 2 Homo sapiens
2 Dose-response curves (DRC) to eformoterol (cumulative dose 6 micrograms to 126 micrograms) for airways and systemic beta 2-responses were constructed at the end of each treatment period. Formoterol Fumarate potassium calcium-activated channel subfamily M regulatory beta subunit 2 Homo sapiens
3 CONCLUSIONS: Our results suggest that chronic therapy with eformoterol produces (1) tachyphylaxis to its bronchodilator response, which was greatest at 6 hours after the last dose, (2) tachyphylaxis of extrapulmonary beta 2-mediated responses, and (3) subsensitivity of in vitro beta 2-adrenoceptor function. Formoterol Fumarate potassium calcium-activated channel subfamily M regulatory beta subunit 2 Homo sapiens