The best place to answer your question is to go to opiophile.org or bluellght. they explain it well. In short. codeine is used to make hyrocodone which is used to make hyrdomorphone. thebaine (its a drug like morphine or codeine) is used as the primary way to make oxycodone, (they can make oxycodone out or codeine) oxycodone is then made into oxymorphone. Basically, all the morphones are pretty much worthless orally. but the codones are great orally. Iv its different. THats the short answer. go to those other sites to get educated on what your putting into your bodies..