Failure of (+)-naloxone to antagonise responses to opioid peptides.
D000818:Animals; D001933:Brain Stem / Q000166:cytology; D004347:Drug Interactions; D004723:Endorphins / Q000037:antagonists & inhibitors*; D004745:Enkephalins / Q000037:antagonists & inhibitors*; D008297:Male; D009270:Naloxone / Q000494:pharmacology*; D009474:Neurons / Q000187:drug effects*; D051381:Rats; D005680:gamma-Aminobutyric Acid / Q000494:pharmacology
D004723:Endorphins; D004745:Enkephalins; D009270:Naloxone; D005680:gamma-Aminobutyric Acid