picrotoxin

noun

1. A poisonous material, extracted from the seeds of plants of species Anamirta cocculus, used as a stimulant; it is a complex of two alkaloids: picrotoxinin and picrotin.

   “In a Sydney inquest on a man who died of an overdose of picrotoxin, a seldom-used drug, while undergoing treatment for a brain ailment in Royal Prince Alfred Hospital, the public learned that, if a medical practitioner makes a risky experiment on a patient and kills him, the practitioner is not criminally liable.”