Response to rimiterol and salbutamol aerosols administered by intermittent positive-pressure ventilation.
The bronchodilator and cardiac effects produced by aerosols of 0.5% salbutamol and 0.5% and 1% rimiterol administered for three minutes in 40% oxygen by intermittent positive-pressure ventilation (I.P.P.V.) were compared in 15 asthmatic patients. Salbutamol and both the concentrations of rimiterol were equipotent in peak bronchodilator effect, but salbutamol had a significantly longer duration of bronchodilator action. There was significantly less increase in heart rate after rimiterol than after salbutamol. Aerosols of 0.5% rimiterol, 0.5% salbutamol, and saline were administered by I.P.P.V. to 10 normal volunteers. There was no difference between the mean heart rates after 0.5% rimiterol and saline but a highly significant increase in mean heart rate was observed after 0.5% salbutamol. It was concluded that 0.5% rimiterol was an effective short-acting bronchodilator drug with little or no cardiac beta(1)-adrenergic activity when administered for three minutes by I.P.P.V. in 40% oxygen.
D000328:Adult; D000336:Aerosols; D000368:Aged; D000420:Albuterol / Q000008:administration & dosage* / Q000627:therapeutic use; D001249:Asthma / Q000188:drug therapy*; D001507:Beclomethasone / Q000627:therapeutic use; D001993:Bronchodilator Agents / Q000008:administration & dosage; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D011175:Positive-Pressure Respiration; D011239:Prednisolone / Q000627:therapeutic use; D013147:Spirometry; D013566:Sympathomimetics / Q000008:administration & dosage* / Q000494:pharmacology / Q000627:therapeutic use; D013997:Time Factors
D000336:Aerosols; D001993:Bronchodilator Agents; D013566:Sympathomimetics; D011239:Prednisolone; D001507:Beclomethasone; D000420:Albuterol