- a preparation of powdered blister beetles, especially the Spanish fly, used medicinally as a counterirritant, diuretic, and aphrodisiac.
- a common European blister beetle, Cantharis (Lytta) vesicatoria, that yields this preparation.
- a European blister beetle, Lytta vesicatoria (family Meloidae), the dried bodies of which yield the pharmaceutical product cantharides
- another name for cantharides
