: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 first century AD and became popular throughout the ancient world as far away as China and India via the trading route the Silk Route. for which it could serve as a synonym: Adam Lonicer wrote that garlic was the rustics' Theriac or Heal-All. The word theriac comes from the Greek term theriaka, signifying "pertaining to animals"… (More on Theriac)