I was chasing a deer and it sprouted spider-legs and climbed into the trees and yelled at me. So kind of?

[He glances at the plants. He doesn't know anything about botany, but not much here looks like anything from earth either.]

Isn't everything that's medicinal poisonous? Probably the only way to find out is to get some volunteer to try it. Or catch a bunch of mice and start some animal testing in the lab.