Triptacederine was an analgesic medication.
In 2370, Elim Garak took "a mere 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 closed captioning of "The Wire".
In the script
for "Ties of Blood and Water", it is spelled triptacedrine.