Ergot is the most powerful known stimulant of the pregnant uterus.
To get drunk for the sake of the drink was the mark of a beast; but wine was a powerful stimulant to the brain, and to fuddle oneself in order to think great thoughts was worthy of a sage.
Another plant universally used as a stimulant in Southern Arabia is khat (Catha edulis).
Internally strychnine acts as a bitter, increasing the secretion of gastric juice and the intestinal peristalsis, being a direct stimulant to the muscular coat; in this manner it has a purgative action.
It is supposed to act in some way as a stimulant in copulation, but possibly has to do with the calcareous covering of the egg-capsule.