Commonly used opioids include morphine, oxycodone, fentanyl, tramadol, hydromorphone, and methadone.

“Morphine and its commercial derivatives MS Contin, which is a long lasting version of morphine. Oxycodone, which by itself is a short acting medication. But when you encapsulate it in a long acting version, it becomes OxyContin, which was the trade name that Purdue put forward. Fentanyl we mentioned comes in a patch form. There are mixed agents like tramadol, which is a kind of a weak opioid but also has some what's called serotonin and norepinephrine, reuptake inhibition. We've got Dilaudid, which is a version of trade name for hydromorphone. So there's a slew. There's, I don't know, more than 20 different opioids within that list of 200 medications that we have. Methadone is another one.”