veronal
A barbiturate, used formerly to induce sleep.
uncountable
He was by now so worn out that he could not resist my firmness. I gave him a sufficient dose of veronal to insure his unconsciousness for several hours. I thought that was the best service I could render him.
Where it comes from
Former trade name, after the Italian city Verona.
Adapted from the Wiktionary entry veronal (CC BY-SA 4.0).