... to which it is reversed by oxygen breathing. Twelve subjects performed two consecutive maximal exercise tests, without and with oxygen supplementation respectively, at sea level and after 1, 3 and 5 days at altitude. On each study day, domperidone (30mg; n = 6) or no medication ( n = 6) was given 1h before...

... produced by central blood volume expansion. 2. Six normal volunteers underwent infusions of α-human ANP preceded by domperidone (a DA 2 -antagonist) or placebo. Eight volunteers underwent a 3 h period of 10° head-down tilt also preceded by domperidone or placebo. 3. Both the ANP infusion and head-down tilt...