Dear Boronia: your shake well reminded me. When sulfa drugs first came out, a drug company
most of whose sales were in the South, where liquid medicines were preferred to tablets was
faced with problem of making a solution of sulfanilamide. A clever chemist read that it dissolved
well in a solvent that was also used as antifreeze in automobile radiators. It was very toxic.
A significant number of fatalities resulted.

I finally remembered the name of solvent: diethylene glycol.