title: Substance P and analgesia.
mesh_terms: D000698:Analgesia; D000818:Animals; D001768:Blister / Q000503:physiopathology; D004361:Drug Tolerance; D007274:Injections, Intraperitoneal; D007276:Injections, Intraventricular; D008297:Male; D051379:Mice; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D010146:Pain / Q000503:physiopathology; D011955:Receptors, Drug; D013373:Substance P / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D011955:Receptors, Drug; D013373:Substance P; D009020:Morphine