"Unresponsiveness" to isoproterenol.
D000336:Aerosols; D000403:Airway Resistance / Q000187:drug effects; D001249:Asthma / Q000188:drug therapy; D001980:Bronchi / Q000187:drug effects; D001986:Bronchial Spasm / Q000139:chemically induced*; D006801:Humans; D007545:Isoproterenol / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D011941:Receptors, Adrenergic / Q000187:drug effects
D000336:Aerosols; D011941:Receptors, Adrenergic; D007545:Isoproterenol