Dependence creating properties of lipotropin C-fragment (beta-endorphin): evidence for its internal control of behavior.
D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D004192:Discrimination, Psychological / Q000187:drug effects; D004723:Endorphins / Q000494:pharmacology*; D004745:Enkephalins / Q000494:pharmacology; D005283:Fentanyl / Q000494:pharmacology; D003932:Heroin / Q000494:pharmacology; D006801:Humans; D008297:Male; D011903:Raphe Nuclei / Q000502:physiology; D051381:Rats; D012646:Self Administration; D019966:Substance-Related Disorders
D004723:Endorphins; D004745:Enkephalins; D003932:Heroin; D005283:Fentanyl