| 1 | 
                
                    HRH2
                
             | 3件:  Calcium signaling pathway Calcium signaling pathway, Neuroactive ligand-receptor interaction, Gastric acid secretion | D00295 
                
                    D00295
                
             | 
                
                    Cimetidine
                
             | 2件:  2 2, 254 | 
| 2 | 
                
                    HRH2
                
             | 3件:  Calcium signaling pathway Calcium signaling pathway, Neuroactive ligand-receptor interaction, Gastric acid secretion | D00318 
                
                    D00318
                
             | 
                
                    Famotidine
                
             | 7件:  6 6, 46, 61, 86, 98, 107, 300 | 
| 3 | 
                
                    HRH2
                
             | 3件:  Calcium signaling pathway Calcium signaling pathway, Neuroactive ligand-receptor interaction, Gastric acid secretion | D00422 
                
                    D00422
                
             | 
                
                    Ranitidine
                
             | 2件:  13 13, 65 | 
| 4 | 
                
                    HRH2
                
             | 3件:  Calcium signaling pathway Calcium signaling pathway, Neuroactive ligand-receptor interaction, Gastric acid secretion | D00673 
                
                    D00673
                
             | 
                
                    Ranitidine
                
             | 2件:  13 13, 65 | 
| 5 | 
                
                    HRH2
                
             | 3件:  Calcium signaling pathway Calcium signaling pathway, Neuroactive ligand-receptor interaction, Gastric acid secretion | D03503 
                
                    D03503
                
             | 
                
                    Cimetidine
                
             | 2件:  2 2, 254 | 
| 6 | 
                
                    HRH2
                
             | 3件:  Calcium signaling pathway Calcium signaling pathway, Neuroactive ligand-receptor interaction, Gastric acid secretion | D08040 
                
                    D08040
                
             | 
                
                    Histamine
                
             | 1件:  13 13 |