An analeptic (or analeptic compound) was a drug that counteracted the effects of radiation. In 2373, Neelix took some analeptic compounds with him on a mission to a Nezu colony planet being bombarded by asteroids. (VOY: "Rise") The Malon used analeptic compounds to ameliorate the cellular degradation caused by theta radiation exposure. In 2375, Fesek treated B'Elanna Torres with analeptic compounds during a mission to prevent a malfunctioning Malon freighter from exploding. (VOY: "Juggernaut")