Thorn, David A Effects of imidazoline I₂ receptor ligands on morphine- and tramadol-induced antinociception in rats. [electronic resource] - European journal of pharmacology Nov 2011 - 435-40 p. digital Publication Type: Journal Article ISSN: 1879-0712 Standard No.: 10.1016/j.ejphar.2011.09.173 doi Subjects--Topical Terms: Agmatine--metabolismAnalgesics--pharmacologyAnimalsBehavior, Animal--drug effectsBenzofurans--metabolismDose-Response Relationship, DrugDrug InteractionsImidazoles--metabolismImidazoline Receptors--metabolismLigandsMorphine--pharmacologyRatsRats, Sprague-DawleyTramadol--pharmacology