Opioids Classification Essay

Opioids are classified according to the receptors they activate.
Drugs can be divided into four groups on the basis of these previous receptors:
 Agonists: By activating all the receptors with different degrees according to the stimulus.
Examples: Morphine, Fentanyl, Hydrocodone, oxycodone and Codeine.
 Antagonists: has an inhibiting effect on all receptor classes.
Examples: Noloxone, Naltrexone
 Agonist-antagonists: Can have dual effect, in other words, it can act as an agonist on some receptors and antagonist on others.
Examples: Nalorphine, Pentazocaine
 Partial agonists: activity of one or more, but not all of the receptors.
Examples: buprenorphine
The different kinds in the opioids classification are eligible of having certain chemical