title: Enkephalins interfere with acquisition of an active avoidance response.
mesh_terms: D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects*; D003864:Depression, Chemical; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D004723:Endorphins / Q000494:pharmacology*; D004745:Enkephalins / Q000494:pharmacology*; D008297:Male; D051379:Mice; D009270:Naloxone / Q000494:pharmacology; D013997:Time Factors
chemical_list: D004723:Endorphins; D004745:Enkephalins; D009270:Naloxone