 Complete the following phrase:  Opium is a highly addictive type of depressant drug which dates back to 3400BC. The opium poppy pods contain a milky substance called latex, which is made up of a number of chemicals such as morphine and codeine. The Latex from the pods is boiled and dried to become opium. Opium has been used throughout history recreationally and as medicine, with historians predicting that opium was likely introduced throughout East Asia in the sixth century A.D. along the Silk Road trade route. The 