Ethnopharmacologicalrelevance: In northeasternBrazil, Dinoponera (Ponerinae)antsmacerateareused to treatearacheanditssting,rheumatism,andbackpain.Suchapopularuseisarelevantfactthat called forexperimentalevaluationoftheantinociceptiveactivityof Dinoponera venom. Materialsandmethods:Dinoponeraquadriceps venom(DqV;5–500 mg/kg;i.v.)ormorphine(3.4mg/kg;s.c.) wereevaluatedinmicemodelsofnociception(n¼8 animals/group)....