| Classification of alkaloid | Family | Representative plants | Compound |
| Colchicum alkaloid | Colchicaceae | Colchicum autumnale | Colchicine |
| Diterpene alkaloid | Ranunculaceae | Aconitum | 14-Anisoylaconine |
| Aconitine | |||
| Benzoylhypaconine | |||
| Benzoylmesaconine | |||
| Hypaconitine | |||
| Jesaconitine | |||
| Mesaconitine | |||
| Imidazole alkaloid | Rutaceae | Pilocarpus microphyllus | Pilocarpine |
| Indole alkaloid | Apocynaceae | Rauwolfia serpentina | Reserpine |
| Loganiaceae | Strychnos nux-vomica | Strychnine | |
| Isoquinoline alkaloid | Amaryllidaceae | Lycoris radiata, Narcissus | Galantamine |
| Lycorine | |||
| Papaveraceae | Lamprocapnos spectabilis | (+)-Bicuculline | |
| Protopine | |||
| Papaver somniferum | Morphine | ||
| Papaverine | |||
| Phenethylamine alkaloid | Ephedraceae | Ephedra sinica | Ephedrine |
| Pyridine alkaloid | Solanaceae | Nicotiana tabacum | (-)-Cotinine |
| (-)-Nicotine | |||
| Tropane alkaloid | Erythroxylaceae | Erythroxylum coca | Cocaine |
| Solanaceae | Datura metel, Scopolia japonica | Atropine | |
| Scopolamine |