to evaluate a possible role for endogenous opiates in modulating sympathetic-adrenal function in humans , we measured plasma epinephrine and norepinephrine ( radioenzymatic method ) , blood pressure and heart rate in 8 normal men ( aged 24-33 years ) before and after placebo or different doses ( 0.4 , 4.8 , 10 mg ) of naloxone .
C0014563
epinephrine
C0028351
norepinephrine