Opioids

Definition

Opioids are a class of drugs that act on the body's opioid receptors, reducing pain and producing feelings of euphoria. They can be natural (e.g., morphine) or synthetic (e.g., oxycodone).

Related terms

Endorphins:

Natural chemicals in the brain that act as the body's natural painkillers and mood enhancers.

Tolerance:

The phenomenon where increasing amounts of opioids are needed to achieve the same desired effect due to neural adaptations.

Withdrawal:

Unpleasant physical and psychological symptoms that occur when someone stops using opioids after prolonged use.