Antimonial

Antimonials, in pre-modern medicine, were remedies principally containing antimony, used chiefly for emetic purposes. They might also have qualified for cathartic, diaphoretic, or simply alternative uses. Such treatments were considered unparalleled in their strength.
Metaphorical usage.
The following passage illustrates the use of the word "antimonial" to mean "emetic" in common (as well as medical) terms: