The author probably based it on the fact that oxycodone is a (semi-?) synthetic opiate produced from one opioid found in poppy, just like heroin is. They are of course not the same.<p>But heroin was synthesized in 19th century in England and oxycodone in 20th century in Germany, therefore it can&#x27;t be considered &quot;pre-&quot; heroin, at least not globally. But maybe heroin wasn&#x27;t common in Germany and therefore oxycodone was pre- in Germany?