is a selective short-acting β2 adrenoreceptor agonist
. It can be called the "granddaughter of adrenalin" in the line of β2
agonists that gave quick relief for bronchospasm and asthma. Epinephrine
(adrenalin) was the first of these, and next came isoprenaline
(isoproterenol). Isoetharine was the third drug in this line, thus the third generation or granddaughter of the original.
In the western US it was the drug of choice in the late 1970s and early 1980s for nebulization ("breathing treatment") to relieve airway spasm. It generally gave sharp relief of shortness of breath, starting within two to five minutes after the patient began breathing the nebulized mist. This rapid onset is not as clearly present in later drugs. Read more...