Soon afterwards she poisoned Claudius and secured the throne for her son, with the intention of practically ruling on his behalf.
According to others, he was poisoned by his physicians at the instigation of his son.
To the Shiites he is a martyr, being believed to have been poisoned by Mamun.
An electuary of opium, known as Mithradatum, was invented by Mithradates VI., king of Pontus, who lived in constant fear of being poisoned, and tested the effects of poisons on criminals, and is said to have taken poisons and their antidotes every day in the year.
Other accounts are: (1) that he was poisoned in the interests of Commodus (Dio.