| Drug | Effect |
| Boneset | Stimulant in vitro |
| Calendula | Stimulant in vitro |
| Drosera | Stimulant and depressant (in vitro) |
| Echinacea | Stimulant in vitro, in vivo |
| Ginseng, eleutherococcus | Stimulant, animal, human |
| Mistletoe | Stimulant, animal, human; suppressant (high doses), human |
| Saw palmetto | Stimulant in vivo |
