Effects of morphine and beta-endorphin on basal and elevated plasma levels of alpha-MSH and vasopressin.
D000818:Animals; D004723:Endorphins / Q000494:pharmacology*; D007274:Injections, Intraperitoneal; D007276:Injections, Intraventricular; D008297:Male; D009074:Melanocyte-Stimulating Hormones / Q000097:blood*; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D009271:Naltrexone / Q000494:pharmacology; D051381:Rats; D014667:Vasopressins / Q000097:blood*
D004723:Endorphins; D014667:Vasopressins; D009271:Naltrexone; D009020:Morphine; D009074:Melanocyte-Stimulating Hormones