The aqueous extracts i.p. of Dracocephalum tanguticum Maxim (DtM), a Tibetan medicine, prolong sighificantly decapitaion-induced gasping duration in mice and the survival time of mice ligated bilateral carotid (P > 0.01). DtM prolong also the primal gasping in mice after injecting the air into the coccygeal vein (P > 0.01) and the survival time in mice poisoned by Lidocaine (P > 0.05). In addition, DtM is possessed of protecting against the pathologic lession of brain in rats under stimulating high altitude hypoxic condition. The results suggest that DtM has a antianoxic effects on mice.