Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Opioid

An opioid is a drug that can suppress the perception of pain and calm a person's emotional response to pain. It does this by reducing the effect of pain signals sent by the nervous system. Opioids produce a feeling of well-being (euphoria). They also cause mood changes, cloudy thinking, and deep sleep. Side effects of opioids may include constipation and nausea. Opioids are also called opiates or narcotics.

Examples of prescription opioids include hydrocodone, oxycodone, fentanyl, and morphine. Heroin is an example of an illegal opioid.

Frequent use of opioids may make a person physically dependent on them. Stopping use or using less may lead to withdrawal. Withdrawal symptoms can include nausea, sweating, chills, diarrhea, stomach cramps, and muscle aches.

Some people who use opioids may develop opioid use disorder. They keep using opioids even though it causes harm to them or others. It can range from mild to severe. Moderate to severe opioid use disorder is sometimes called addiction.

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