the duration of the antihypertensive action at rest seemed to be nearly similar , while the effects of betaxolol on exercising heart rate and blood pressure were more prolonged than those of atenolol : on the wash out day , plasma atenolol and betaxolol levels fell in a same way but the increase in peak systolic blood pressure was more marked in group a than in group b , so that the positive correlation we found between the plasma drug levels and the percentage of peak systolic blood pressure reduction , was much closer with atenolol ( p less than 0.001 ) than with betaxolol ( p less than 0.05 ) .
C0020649
blood pressure reduction
C0005320
betaxolol