alterative
Al"ter*a*tive, a. Etym: [L. alterativus: cf. F. altératif.] Defn: Causing ateration. Specifically: Defn: Gradually changing, or tending to change, a morbid state of the functions into one of health. Burton. Al"ter*a*tive, n. Defn: A medicine or treatment which gradually induces a change, and restores healthy functions without sensible evacuations.