» For the radiation therapy machine involved in several accidents, see Therac-25. Theriac or theriaca was a medical concoction originally formulated by the Greeks in the 1st Century AD and became popular throughout the ancient world as far away as China and India via the mercantile trading via the Silk Route. The word theriac comes from the Greek term theriaka. The Greek word refers to ancient bestiaries about dangerous beasts and their bites. Theriac was later called by the English treacle, (t… (More on Theriac)