| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Nicotinic Acids | 100 | + | |
| 2 | Picolines | 31 | + | |
| 3 | Aminopyridines | 23 | + | |
| 4 | Pyridones | 20 | + | |
| 5 | Pheniramine | 18 | + | |
| 6 | Pyridinium Compounds | 16 | + | |
| 7 | Metyrapone | 10 | + | |
| 8 | Triprolidine | 7 | + | |
| 9 | Nicotine | 6 | + | |
| 10 | 2-Pyridinylmethylsulfinylbenzimidazoles | 6 | + | |
| 11 | Dihydropyridines | 4 | + | |
| 12 | Picolinic Acids | 2 | + | |
| 13 | Isonicotinic Acids | 1 | + | |
| 14 | Carbolines | 1 | + |