Trioxin
From Star Trek : Freedom's Wiki
Trioxin is a medicine used in the treatment of respiratory injuries.
In an alternate timeline, The Doctor was ordered by Captain Janeway to inject her with trioxin after her alveoli were damaged by nebular gas in 2374. (VOY: "Year of Hell, Part II").
Trioxin is possibly a development from tri-ox compound due to its effect and use on the respiratory system.
