Iatrochemist

n. one who specializes in iatrochemistry, one who studies chemistry for medical purposes (mainly popular in the 16th and 17th centuries)

Iatrochemistry is a branch of both chemistry and medicine. Having its roots in alchemy, iatrochemistry seeks to provide chemical solutions to diseases and medical ailments.This area of science has fallen out of use since the rise of modern medical practices. However, iatrochemistry was popular between 1525 and 1660, especially in Flanders. Its most notable leader was Paracelsus, an important Swiss alchemist of the 16th century. Iatrochemists believed that physical health was dependent on a specific balance of bodily fluids.
See more at Wikipedia.org...

(n.)
A physician who explained or treated diseases upon chemical principles; one who practiced iatrochemistry.