Final answer:
Opiate drugs occupy the same receptor sites as endorphins and act as agonists to reduce pain and produce euphoria.
Step-by-step explanation:
Opiate drugs occupy the same receptor sites as endorphins. These drugs, which are derived from the opium poppy or synthetically produced, mimic the action of the body's natural painkillers, endorphins. This group of psychoactive drugs includes substances such as heroin, morphine, oxycodone, and methadone. Opioid drugs have analgesic properties because they bind to opioid receptors in the brain, spinal cord, and gastrointestinal tract, changing the way a person experiences pain. As agonists of these receptors, they can reduce pain and produce euphoria, leading to a high potential for abuse.