Juvenal reports he was given a magic potion that drove him insane. Suetonius said that Caligula suffered from “falling sickness”, or epilepsy, when he was young. Modern historians have theorized that Caligula lived with a daily fear of seizures.
How was Gemellus killed?
Caligula loved Gemellus as a brother, and he adopted him as his own heir on Tiberius’ death. However, in 38 AD he had Gemellus executed in a fit of rage, attempting to make his sister/lover Drusilla have a reaction to this act of cruelty.
Which Roman emperor was poisoned by his wife?
After marrying his niece Agrippina, Claudius adopted her son Lucius Domitius Ahenobarbus (later the emperor Nero) to satisfy Agrippina’s lust for power, much to the disadvantage of his own son Britannicus. Roman tradition is unanimous: Claudius was poisoned by Agrippina on October 13, 54 CE, though the details differ.