Understanding Opioids: History, Types, Mechanis...
1. Definition of opioids Opioids are chemicals that bind to opioid receptors (ORs) in the central and peripheral nervous systems. These receptors modulate pain, stress and emotions. Opioids include natural substances (such as morphine and codeine), semi-synthetic compounds (such as oxycodone), and synthetic opioids (such as fentanyl). They are mainly used for their powerful analgesic properties. Note: Our body also...