title: Stress activates endogenous pain-inhibitory systems: opioid and non-opioid mechanisms.
mesh_terms: D000818:Animals; D003907:Dexamethasone / Q000494:pharmacology; D004723:Endorphins / Q000502:physiology*; D008297:Male; D009270:Naloxone / Q000494:pharmacology; D010146:Pain / Q000503:physiopathology*; D051381:Rats; D013312:Stress, Physiological / Q000503:physiopathology*; D013997:Time Factors
chemical_list: D004723:Endorphins; D009270:Naloxone; D003907:Dexamethasone