I mean, these things are just a laundry list of deadly poisons, one after another: arsenic, mercury, belladonna, not to mention all the heroin and cocaine.
In a hundred hours she had come to possess all the world's dark magic; the blinding belladonna, the caffein converting physical into nervous energy, the mandragora that imposes harmony.
Both of the plants are members of Nightshade family. The Nightshade family is a category of plants which also includes many that you wouldn’t want to eat, like mandrake, belladonna, and even tobacco.