title: Potentiation by cocaine of responses of the guinea-pig isolated tracheal chain to ethylnoradrenaline and  -methylnoradrenaline.
mesh_terms: D000818:Animals; D003042:Cocaine / Q000494:pharmacology*; D004357:Drug Synergism; D006168:Guinea Pigs; D066298:In Vitro Techniques; D007536:Isomerism; D009638:Norepinephrine / Q000494:pharmacology*; D009647:Normetanephrine / Q000494:pharmacology*; D011433:Propranolol / Q000494:pharmacology; D014132:Trachea / Q000187:drug effects*
chemical_list: D009647:Normetanephrine; D011433:Propranolol; D003042:Cocaine; D009638:Norepinephrine