propranolol produced higher peak epinephrine levels than atenolol or placebo ( 808 +/- 162 , 640 +/- 190 and 584 +/- 153 pg/ml , respectively , p = 0.03 ) , but norepinephrine levels did not show significant differences .
C0014563
epinephrine
C0028351
norepinephrine