Hi George,
We are reading Tarot, so anything is possible. We as readers are advised to always derive your own interpretations. If you feel the caduceus refer to medicine, then that is how you apply it.
As a lead on to the article on the Rod of Asclepius, I have another doc, but have to really look for it, as it is saved in another one???
Some interesting facts.
The caduceus refer to Hermes and Mercury, the planet associated with the Magician. Hermes is the protector of thieves, liars, traders and travelers. The Lion's head pertains to strength in numbers.
After Moses put the snake on the pole, the Hebrews got to worship this "God" for a very long time, even if it couldn't heal them any longer.
In the 30's most medical practitioners had no degree or formal schooling in medicine. Thus the reference "kwak".
Blessed be.