Aminotetralin adrenergic β-agonists

Smooth muscle tissue relaxation is produced in mammals by internal administration of a compound of the formula: ##STR1## wherein R is alkyl having 1 to 6 carbon atoms, the novel compound 2-N-isopropylamino-1,2,3,4-tetrahydro-5,6,-dihydroxy-naphthalene being preferred. Relief of bronchial asthma and relaxation of the uterine smooth muscle are among the therapeutic effects produced.