Sentence:  Etorphine ... "Informal Names": <WSD>Elephant Juice</WSD> ... When humans in an experiment received etorphine they experienced euphoria and described the drug as feeling like morphine. Researchers who administered etorphine in that experiment concluded that the drug is likely to be abused. Misuse has been noted in China. 
Meaning of the word marked with <WSD> tags:  Taken as a drug by humans.