Example image of eyePlorer eyePlorer map for 'Receptor antagonist': Agonist Drug Ligand (biochemistry) Receptor (biochemistry) Inverse agonist Pharmacology Hormone Protein Cell nucleus Intracellular receptor Mitochondrion Binding site Noncovalent bonding Allosteric regulation Physiological agonism and antagonism Adrenergic receptor Epinephrine Histamine Histamine H1 receptor Vasodilation Receptor theory Functional selectivity Efficacy Dose-response relationship IC50 Potency Schild regression Competitive antagonist Dissociation constant Interleukin 1 Interleukin 1 receptor antagonist Cyclothiazide Metabotropic glutamate receptor 1 Memantine NMDA receptor Partial agonist Analgesic Buprenorphine Methadone Opioid receptor Histamine antagonist Receptor-ligand kinetics Covalent bond Alpha blocker Norepinephrine Phenoxybenzamine (R)-3-Nitrobiphenyline 2-Methyl-6-(phenylethynyl)pyridine 5'-Guanidinonaltrindole 5-HT3 antagonist