Socrates (film)
His enemies, led by a young man named Meletus, accuse him in court, arguing that the philosopher preaches crazy doctrines to the youth, and does not believe in the gods, but demons. Socrates makes his "apology" (i.e., legal defense), but the citizens are against him; so Socrates is sentenced to death, and held in prison, awaiting execution. His disciples are desperate, and one of them, Crito, tries to help him by encouraging him to flee. Socrates rejects this idea, saying he must obey the rulers of the city. Socrates then resolves to die, and dies as soon as he is forced to drink hemlock.
Oenanthotoxin
The discovery and use of plants containing oenanthotoxin predates Socrates and Homer and its first use as a poison is thought to have been implemented between 1800 BCE and 800 BCE in Pre-Roman Sardinia. In Ancient Sardinia, it was considered to be a humane form of euthanasia. Elderly people who were unable to care for themselves were given water dropwort and dropped from a high rock to ensure death. It is also believed that Socrates ingested the plant to commit suicide.