title: Behavioral effects of chronic narcotic antagonist administration of infant rats.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000502:physiology*; D001522:Behavior, Animal / Q000187:drug effects*; D001835:Body Weight; D008297:Male; D009020:Morphine / Q000494:pharmacology; D009271:Naltrexone / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology*; D051381:Rats; D011930:Reaction Time / Q000187:drug effects
chemical_list: D009292:Narcotic Antagonists; D009271:Naltrexone; D009020:Morphine