A strong painkiller that Garak takes in dangerous quantities when his Obsidian Order cranial implant begins to fail, with little effect on the agony it causes him.
Triptacederine is a potent analgesic seen in the Deep Space Nine episode The Wire. When Garak begins suffering crippling headaches, Julian Bashir discovers that the tailor has been dosing himself with the drug in secret.
Bashir is alarmed by the amount involved, remarking that thirty cubic centimetres would be enough to anaesthetise an Algorian mammoth, yet it has barely dulled Garak's pain. The cause turns out to be the implant placed in his brain by the Obsidian Order, which he has left switched on for two years and which is now breaking down.
The failure of the drug is one of the clues that leads Bashir to the implant and, eventually, to Enabran Tain in search of the information needed to keep his friend alive.