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Opioids are narcotic pain medications, such as codeine, fentanyl, hydrocodone, methadone and morphine, that reduce pain by blocking messages to the brain, notes WebMD. Opioids have serious side effects if people do not take them correctly.


There are two main types of opioids: legal prescription opioids and illegal opioids. Prescription opioids include oxycodone while illegal opioids include heroin. Regardless of legality, each type of opioid suppresses pain and is highly addictive.


Opioids, also known as opiates, are narcotic painkillers that act on opioid receptors in the body. Doctors prescribe opioids for both acute and chronic pain management. However, legally regulated opioids such as oxycodone and illegal opiates including heroin are often used recreationally and frequen


Codeine, morphine, methadone and oxycodone are some opioid medications. Opioids are a class of narcotics generally prescribed as painkillers, notes WebMD. Opioids have the potential to be addictive and are not available over the counter as of 2015.


An opioid addiction is a physical dependency on substances that contain opioids. Opioids are found in some prescription medications and in illegal drugs such as heroin.


Short-term effects of opioid use include decreased pain, euphoria, drowsiness, constipation and nausea, and long-term effects include physical dependence and addiction, according to the National Institute on Drug Abuse. Opioid use may also cause decreased respiration and decreased oxygen sent to the


The duration of opioid withdrawal symptoms depends on the half-life of the opioid concerned, according to Medscape. As an example, withdrawal symptoms following the cessation of heroin use may last between 7 and 10 days. Methadone withdrawal can last for upwards of 14 days.


Some specialists believe that some lingering opioid withdrawal symptoms may last for several months or more, states Healthline. However, the first and most acute phase of withdrawal begins between 12 and 30 hours after the last dose of the drug and ends after five days, explains Balboa Horizon Treat


Preparation for the side effects of withdrawal from opiates is the most important step for detoxification at home, according to Healthline. Staying comfortable and safe are also important steps to prevent relapse.


Cell metabolism involves several complex biochemical reactions that occur in living organisms to maintain a normal life. These metabolic pathways are broadly classified as anabolism and catabolism.