What are the fake Oxycontin 80s typically made of? Fifteen out of the past 25pcs of OC 80s have resulted in receiving the fake Oxycontin 80s. From what I have observed, it is impossible to tell the difference by simply looking at them. Whatever is in the fake ones does help reduce the pain. It also makes me extremly tired. However, there is no warm euphoric effect. I don't even get the taste or the drainage down my throat. I sure would like to know what is in these. Some websites suggest that Fentanyl is being used. Would also like to know how to tell the difference between real and fake before actually buying them and scraping them down. Also I have noticed that the white powder, after the pill has been scraped, is finer in the fake OC 80 than in the real OC 80. Any information is greatly appreciated.