Pulmozine
From Star Trek : Freedom's Wiki
Pulmozine is a drug used to treat oxygen deprivation and stimulate breathing.
In 2372, The Doctor gave 40 milligrams of pulmozine to one of Seska's aides, Tierna, after he was brought aboard the USS Voyager. (VOY: "Basics, Part I")
In 2373, The Doctor used pulmozine to stimulate breathing in Lt. B'Elanna Torres after she was injured during an attack on the Nasari. (VOY: "Favorite Son")