"Opioid" is a term used for the entire family of opiate substances, including natural, synthetic and semi-synthetic. These substances are chemically related to and interact with opioid receptors on nerve cells in the body and brain.
Natural |
Synthetics |
Semi- Synthetic |
Morphine |
Heroin |
Fentanyl |
Codeine |
Oxycodone, Oxymorphone, Hydrocodone, Hydromorphone |
Methadone, Meperidine |