The anticipation of some marvellous secrets was so universal, and the Roman publishers so well disposed to cater for this, that it is not to be wondered at that a confection of Mithridates and stories of its miraculous power soon found their way into literature. A pompous formula, which it was professed had been discovered among the papers of Mithridates captured by Pompey came to be known under the title of Antidotum Mithridatium. It is noteworthy that Plutarch, who in his life of Pompey mentions that certain love letters and documents helping to interpret dreams were among these papers, makes no allusion to the medical recipe; while Samonicus states explicitly that, notwithstanding the many formulæ which had got into circulation pretending to be that of the genuine confection, the only one found in the cabinet of Mithridates was a trivial one for a compound of 20 leaves of rue, 1 grain of salt, 2 nuts, and 2 dried figs. So that, Dr. Heberden remarks, the King of Pontus may have been as much a stranger to the medicine to which his name was attached as many eminent physicians of this day are to medicines associated with their names.
The compound, made from the probably spurious formula, however, acquired an immense fame. Some of the Roman emperors are declared to have compounded it with their own hands. Galen says that whoever took a proper dose in the morning was ensured against poison throughout that day. Great physicians studied it with a view of making it, if possible, more perfect. The most important modification of the formula was made by Andromachus, Nero's physician, who omitted the scink, added vipers, and increased the proportion of opium. He changed the name to Galene, but this was not retained, and in Trajan's time the name of
