PEDIATRICS Vol. 104 No. 2 Supplement August 1999, pp. 384
-Adrenergic Agonist Therapy
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Purpose of the Study
In addition to their bronchodilatory effects,
2-agonists
protect against bronchoconstriction, such as that caused by
methacholine challenge. However, tachyphylaxis to this beneficial
effect develops after chronic use of
2-agonists. They
studied whether the frequency or dose of treatment with a long-acting
2-agonist (formoterol) effects the degree of
bronchoprotection afforded against methacholine challenge and to
compare this with the effects of a short-acting
2-agonist (terbutaline).
Study Population and Methods
In a randomized, parallel group, double-blind study at two