Morphine, fentanyl, oxycodone, demerol, codeine, methadone – these are just some of the known painkillers that are classified as opioid analgesics.
Morphine Side Effects and Risks

Morphine, fentanyl, oxycodone, demerol, codeine, methadone – these are just some of the known painkillers that are classified as opioid analgesics.