Methadone is a medication in a classification of drugs known as narcotic pain relievers. It is used in the treatment of moderate to severe pain. According MayoClinic.com, methadone also reduces withdrawal symptoms in people addicted to heroin or other narcotic drugs without causing the "high" associated with the drug addiction. It is frequently used as a part of drug treatment and detoxification therapy. There are some harmful side effects associated with methadone of which users should be aware.
Respiratory Depression
A harmful side effect of methadone is respiratory depression. Like other narcotic medicines, methadone can slow breathing, even long after the pain-relieving effects of the medication wear off, says MayoClinic.com. Drinking alcohol while taking methadone can increase the risk for respiratory failure. Patients should check the labels of any other routine medications to ensure that they do not contain alcohol.
Taking more than the recommended dosage of methadone can increase the risk of developing respiratory depression. This medication should always be kept out of the reach of children and mentally-impaired individuals.
Hallucinations and Confusion
Some patients may experience hallucinations and confusion while taking methadone. These side effects may diminish over time as the body adjusts to this medication. Methadone can cause side effects that may impair one's thinking or reactions, says MayoClinic.com. Patients should use caution while driving or completing tasks that may be dangerous until they know how methadone will affect them. These side effects should be reported to a physician.
Increased Dependence and Tolerance
Methadone may be habit-forming and should be used only by the person for whom it has been prescribed. It may lead to increased dependence in some patients. Dependence occurs when the body requires methadone in order to function properly. Increased tolerance may occur if methadone is taken for a long period of time. With an increased tolerance, the dosage may need to be increased since the body becomes used to its effects, and patients will no longer experience relief from the prescribed dose. Methadone should never be given to another person, especially someone who has a history of drug abuse or addiction, says Drugs.com.
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