Neurazine was an anesthetic sedative drug used aboad Dominion starships in the 24th century.
History and specifics
Neurazine was heavy sedative that induced anesthesia, rendering a patient unconscious. It was used as an intruder control gas primarily aboard Cardassian and Dominion starships, serving a similar function to anesthizine on Starfleet ships. (Last Unicorn RPG module: Raiders, Renegades & Rogues)
In 2375, after sneaking aboard a Jem'Hadar attack ship and waiting for its engineers to install a Breen energy dampening weapon, Kira Nerys ordered the Cardassian Liberation Front strike team to release neurazine gas on all decks except the bridge, then they cleared moorings and successfully hijacked the fighter. (DS9 episode: "Tacking Into the Wind")