Most Execrable and Abominable or Irreligious: When Pope Clement Tested Poisons

"Sometime in the 1540s or 1550s, the esteemed anatomist Gabriele Falloppio (1523–1562) described a test he had conducted on a condemned criminal granted to him by Grand Duke Cosimo I de’ Medici. Duke Cosimo gave him the convict with the understanding that Falloppio could kill the man as he wished and dissect the body afterward. Falloppio decided to experiment with fatal doses of opium, a substance often described as a poison in the scholarly literature.

The prisoner survived the first test and asked for the dose to be doubled on the second attempt..."

Lol.

I can't make heads or tails of this. The poison was -

https://en.wikipedia.org/wiki/Pseudaconitine from the Monkshood.

But what was in Caravita's Oil and did it even work or was it just chance that the prisoner lived? Google isn't much help as it all leads back to this same book.

I didn't realise that popes getting poisoned was a common occurrence at any time in history.