in order to study the role of opioid- and betareceptors on exercise-induced catecholamine responses , the effects of acute intravenous administration of 1 and 4 mg naloxone and of the non-selective betablocker timolol 2 mg of on circulating concentrations of adrenalin , noradrenaline and dopamine during exercise to exhaustion were examined in eight normal , healthy young men , using a double-blind , randomized , placebo-controlled design .
C0014563
adrenalin
C0028351
noradrenaline