demonifuge
/dɪˈmɒnɪfjuː(d)ʒ/ /diːˈmɒnɪfjuː(d)ʒ/noun
A substance or medicine used to exorcize a demon; (also more generally) anything thought to give protection against evil spirits.
Origin
Mid 18th century; earliest use found in Thomas Hartley (?1709–1784), religious writer and translator. From classical Latin daemōn demon + -i- + -fuge, after e.g. febrifuge.