Abstract: | 1 In a double-blind trial the effects on ventilatory function (FEV1), heart rate and blood pressure of oral pirbuterol and oral salbutamol in various single doses were studied in ten patients with chronic asthma. 2 Pirbuterol (15 mg) and salbutamol (4 mg) produced equal peak levels of bronchodilatation. 3 There was no significant difference in the mean rise in heart rates caused by the two drugs, and no other significant side-effects were noted. |