Plants which induce vomiting: adder's tongue, bay, black mustard seeds, blue flag, bloodroot, cliffrose, elkweed, roots, hedge-hyssop, ilex berries, mandrake, mayapple, wake-robin roots, and white mustard seeds.
Agents that cause vomiting. They may act directly on the gastrointestinal tract, bringing about emesis through local irritant effects, or indirectly, through their effects on the chemoreceptor trigger zone in the postremal area near the medulla.