Opioid analgesics are commonly referred to as prescription opioids, medications that have been used to treat moderate to severe pain in some patients. Categories of opioids for mortality data include:
- Natural opioid analgesics, including morphine and codeine;
- Semi-synthetic opioid analgesics, including drugs such as oxycodone, hydrocodone, hydromorphone, and oxymorphone;
- Methadone, a synthetic opioid that can be prescribed for pain reduction or for use in MAT for opioid use disorder (OUD). For MAT, methadone is used under direct supervision of a healthcare provider;
- Synthetic opioid analgesics other than methadone, including drugs such as tramadol and fentanyl.