Triptacederine was an analgesic medication.
In 2370, Elim Garak used thirty ccs of triptacederine to alleviate the pain caused by his cranial implant, which would usually be enough to anesthetize an Algorian mammoth. (DS9: "The Wire")
During the final stage of his Yarim Fel Syndrome in 2373, Tekeny Ghemor was administered triptacederine to minimize the pain. (DS9: "Ties of Blood and Water")
An alternate spelling "triptacederin" comes from "The Wire"'s closed captioning. In the script for "Ties of Blood and Water", it is spelled triptacedrine.