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J R Soc Med. 2002 May; 95(5): 260–261.
PMCID: PMC1279685

The death of Claudius

V J Marmion, FRCPE FRCOphth and T E J Wiedemann, MA PhD1

Although the lifestyle of the Roman Emperor Claudius was characterized by overwork, gluttony and poor health, he survived to the remarkable age of 64. Even then, the circumstances of his death aroused suspicion. Was he poisoned?

The Claudians were amongst the oldest patrician families in Roman society, and they entered the imperial line through the marriage of Livia to the Emperor Augustus (Box 1). The early life of her grandson Claudius was not propitious. His physical disabilities were such that, when he assumed the toga virilis on reaching his majority, he was taken for the ceremony at night; and similarly, in 6 AD, on the occasion of a gladiatorial spectacle in memory of his father Drusus, Augustus required him to attend covered in a cloak. Through his early studies Claudius became a considerable historian and acquired a detailed knowledge of the law, but there seemed no likelihood that this ungainly figure would ever be nominated Emperor. The death of Augustus in 14 AD put him fourth in line of succession, after Tiberius, Germanicus and Gaius Caligula. However, Germanicus died, and 4 years of despotic horror led to the assassination of the Emperor Caligula in 41 AD.

Box 1
Claudius and his relations

Claudius' first public office had been as consul at the beginning of Caligula's rule; and his performance in that post must have impressed the praetorians greatly to account for his rapid selection as Emperor. The 13 years of his reign were marked by progress through consolidation, the conquest of Britain (which he visited for sixteen days) and the development of the imperial civil service. He was married four times—to Plautia, Paetina, Messalina and Agrippina. In the matter of his death, suspicion has fallen particularly upon Agrippina.


Many explanations have been proposed for Claudius' early disabilities, including most recently a movement disorder1, but there is no reason to think they were the cause of his death in October 54. Levick2 judges that, while murder cannot be proven, on balance it looks as if his departure was brought about by Agrippina ‘rather than due to her good luck’. In reaching this conclusion Levick cites the Senecan Octavia (68 AD)3 and Pliny the Elder4, both of whom assume murder.

Agrippina was anxious that her son Nero rather than Britannicus (Claudius' son by Messalina) should succeed as Emperor; and the prospects for Britannicus would greatly improve in five months' time when he gained his majority and acquired not only the same rights as Nero to the property of the Caesars but also political power. No wonder that, when Claudius died, enemies were eager to spread rumours about the death. Moreover, proof of poisoning was usually impossible, and successful prosecutions depended more on motive than medical evidence—as indicated by Tacitus5 in the case of Piso.

The death

The nearest we have to a contemporary account of Claudius' death is in Seneca's Apocolocyntosis6, probably written in December 54. This satire has the death taking place while Claudius was being entertained by a group of comic actors—which may be a jibe at his low tastes but does indicate that the final illness came on quickly. (Those not present might well have thought the process longer, because for security reasons the death was not announced till next day.) The illness began between the sixth and seventh hours (about noon) and death occurred between then and one o'clock. Seneca is quite clear about the timing. Claudius began to gasp his last and could find no way to go—animam agere coepit nec invenire exitum poterat. In Seneca's version, Mercury appeals to Clotho to let him die quickly, a request which seems to be granted. The Emperor's death is depicted unkindly:

Ultima vox eius haec inter homines audita est, cum maiorem sonitum emisset illequae facillius loquebatur, ‘va me, puto concacavi me’.

[This was the last utterance of his to be heard among men, after he let out a sound from that part with which he found it easier to communicate, ‘Oh I think I have shit myself’].

Seneca goes on to remark, Certa omnia con[ca]cavit [He certainly shat up everything else]. If the Emperor had vomited as well, Seneca would surely not have been too delicate to mention it.


The tradition that death was due to mushroom poisoning surfaces in Tacitus5, Suetonius7, Dio Cassius8 and Juvenal9. Dio, writing in the third century, offers a detailed description of how Agrippina shared a plate of mushrooms, one of them poisoned, with her husband; and Josephus10 reports the same rumour. The suggestion is that some substance was added. Tacitus, early second century, claims that a poisoned feather was administered to Claudius by his personal physician Xenophon.

Of the poisonous mushrooms in the Mediterranean region, suspicion has fallen most on the genus Amanita. Amanita muscaria and A. pantheria are seldom fatal in adults11. A. phalloides (the deathcap) is highly dangerous and has been incriminated by Benjamin12 in the case of Claudius. However, this does not fit the picture very well. This mushroom takes 10-15 hours to act, and toxicity arises in three phases, culminating in liver failure. The timing, therefore, is inconsistent with the accounts of Seneca, Tacitus and Dio, though admittedly in Suetonius' account Claudius dies towards morning after a night of excruciating pain13. Another mushroom candidate, Coprimus atramentarius, produces disulfiram, which in combination with alcohol would have caused nausea, vomiting and other symptoms; Claudius was notorious for intemperance.

Other poisons

Tacitus' reference to the insertion of a feather by Xenophon suggests that the Emperor was not vomiting spontaneously; and, though Suetonius refers to vomiting, this could have been a response to Xenophon's manoeuvre. There is not much credibility in Tacitus' insinuation that Xenophon himself—who had been amply rewarded for loyal service14—committed the murder by applying poison to the Emperor's throat. It is more likely that the physician was testing the reflexes of his dying patient. As to the possibility that Agrippina put poison on one of the Emperor's mushrooms, that must remain entirely a matter for speculation. However, as Levick points out1, those present at the banquet do not seem to have suspected poisoning of any sort; moreover, the eunuch Halotus, whose job was to taste the Emperor's food, kept his job when Nero assumed the throne—evidence that nobody wanted to put him out of the way, either as an accomplice or as a witness to empericide.


We see no reason to believe that Claudius was murdered. All the features are consistent with sudden death from cerebrovascular disease, which was common in Roman times. Towards the end of 52 AD, at the age of 62, Claudius had a serious illness and spoke of approaching death. Around that time there were changes in his depiction in busts, cameos and coins—with thick neck, narrow shoulders and flat chest16. The Apocolocyntosis, addressed to an audience some of whom were present at the death, makes clear that there is no need to postulate poisoning, accidental or otherwise.


1. Levick B. Claudius. London: Batsford, 1990
2. Rice J E. The emperor with the shaking head: Claudius' movement disorder. J R Soc Med 2000;93: 198-201 [PMC free article] [PubMed]
3. Whitman LY, ed. Seneca: Octavia. Berne: PH Verlag, 1978
4. Rackham W, ed. Pliny the Elder: Natural History. London: Heinemann, 1962
5. Grant M (transl.). Tacitus: The Annals of Imperial Rome. Harmondsworth: Penguin Classics, 1989
6. Eden PT, ed. Seneca: Apocologyntosis. Cambridge: Cambridge University Press, 1990
7. Mottershead J, ed. Suetonius: Claudius. Bristol: Classical Press, 1969
8. Cary E, ed. Dio Cassius: Roman History. London: Heinemann, 1925
9. Stocker CW. The Satires of Persius and Juvenal VI. London: Longman Brown, 1845: 268
10. Feldman LH (transl.). Josephus: Antiquities. Cambridge, MA: Harvard University Press, 1965
11. Amdur MO, Doull J, Klassen CD. Casaret and Doull's Toxicology. 4th edn. New York: Pergamon, 1991: 810-12
12. Benjamin DP. History of Mushroom Eating and Mushroom Poisoning. New York: Freedman, 1995
13. Gould GP, ed. Suetonius: Galba. Loeb Classical Library, 1979
14. Grimm-Samuel V. On the Mushroom which Deified the Emperor Claudius. Classical Quart 1991;41: 178-82
15. de Coursey-Ruth T. The Problem of Claudius: A Dissertation. Baltimore: The Lord Baltimore Press, 1916
16. Levin GZ. Vascular brain lesions and ischaemic heart disease. Zh-Nevropatol-Psikhiatr 1979;79: 1306-11 [PubMed]

Articles from Journal of the Royal Society of Medicine are provided here courtesy of Royal Society of Medicine Press