AP PSYCHOLOGY

Detailed explanation-1: -Opioids include heroin, morphine, codeine, fentanyl, methadone, tramadol, and other similar substances.

Detailed explanation-2: -The two most commonly used centrally acting opioid receptor antagonists are naloxone and naltrexone. Naloxone comes in intravenous, intramuscular, and intranasal formulations and is FDA-approved for the use in an opioid overdose and the reversal of respiratory depression associated with opioid use.

Detailed explanation-3: -The natural stilbene pawhuskin A has been shown to function as an opioid receptor antagonist, with preferential binding to the receptor.

Detailed explanation-4: -Opioids are a class of drugs naturally found in the opium poppy plant. Some prescription opioids are made from the plant directly, and others are made by scientists in labs using the same chemical structure. Opioids are often used as medicines because they contain chemicals that relax the body and can relieve pain.