Endorphins and enkephalins.
D000818:Animals; D004723:Endorphins / Q000502:physiology*; D004745:Enkephalins / Q000502:physiology*; D006801:Humans; D001523:Mental Disorders / Q000378:metabolism; D009292:Narcotic Antagonists / Q000627:therapeutic use; D009294:Narcotics / Q000494:pharmacology; D012769:Shock / Q000503:physiopathology; D013119:Spinal Cord Injuries / Q000503:physiopathology
D004723:Endorphins; D004745:Enkephalins; D009292:Narcotic Antagonists; D009294:Narcotics