Opioid

From Drug Rehab Wiki

An opioid is a chemical that works by binding to opioid receptors, which are found in the central nervous system and the gastrointestinal tract. Common opioids include OxyContin, Vicodin, and fentanyl. The analgesic effects of opioids are due to decreased perception of pain, decreased reaction to pain, and increased pain tolerance. Physical dependence can develop with ongoing administration of opioids, leading to a withdrawal syndrome with abrupt discontinuation. Opioids can produce a feeling of euphoria, which can lead to recreational use of opioids.