jalap

Dr. Adam Kuhn called the mercury and jalap drink “a murderous dose” and said so in the newspapers.

From "An American Plague: The True and Terrifying Story of the Yellow Fever Epidemic of 1793" by Jim Murphy

At Barrett’s apothecary, Eliza purchased jalap and Bohea tea.

From "Fever 1793" by Laurie Halse Anderson

Though, judging from the taste of your jalap, I can't see how that could be.

From Amusement Only by Richard Marsh

Then give a tablespoonful of castor-oil, or about as much jalap as will lie on a shilling, mixed in butter; make a pill of it, and slide it into the crop.

From Poultry A Practical Guide to the Choice, Breeding, Rearing, and Management of all Descriptions of Fowls, Turkeys, Guinea-fowls, Ducks, and Geese, for Profit and Exhibition. by Hugh Piper

They said also that he took "jalap" at night, and that he saw as many battles as there were depicted on his carpet by Dutch art.

From With Fire and Sword An Historical Novel of Poland and Russia. by Henryk Sienkiewicz