title: Potentiation by an antagonist.
mesh_terms: D000818:Animals; D004336:Drug Antagonism; D004357:Drug Synergism; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D007454:Iodides / Q000494:pharmacology*; D008959:Models, Neurological; D009119:Muscle Contraction / Q000187:drug effects*; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology; D011955:Receptors, Drug; D009435:Synaptic Transmission
chemical_list: D007454:Iodides; D000644:Quaternary Ammonium Compounds; D011955:Receptors, Drug