Methadone is a prescription narcotic medication used to treat pain or as part of a drug addiction detoxification program, according to Drugs.com. The Mayo Clinic states that detoxification may involve gradually reducing the dose of the drug or temporarily substituting the drug that you are addicted to with another drug, such as methadone. Although it may be used in detoxification programs, methadone can also be addictive. Therefore, it is important that you use this medication as directed by your doctor to prevent addiction. Moreover, methadone is also associated with certain side effects of which you should be aware.
Respiratory Effects
Methadone may cause shallow breathing, which can result in a cessation of breathing if used incorrectly, states Drugs.com. This occurs because methadone depresses the breathing centers in your brain and slows your breathing rate. This side effect is serious and you should seek immediate medical treatment if you are having trouble breathing.
Nervous System Effects
Drugs.com states that methadone may affect your nervous system. These effects include hallucinations, confusion, anxiety, nervousness, restlessness, insomnia, drowsiness and decreased sex drive or difficulty having an orgasm. Methadone alters the activity of pain receptors, in addition to other receptors in your brain that are aggravate these side effects. Most people eventually adjust to these side effects over time. However, it is still important to let your doctor know about them, so she can adjust your dosage or prescribe a different medication.
Cardiovascular System Effects
Methadone may also cause serious side effects on your cardiovascular system. Drugs.com states that Methadone can cause chest pain, dizziness, fainting, irregular heartbeat and lightheadedness. This occurs because methadone sometimes interferes with receptors that are responsible for normal cardiovascular functioning. Seek immediate medical attention if you are having chest pain, faint or have an abnormal heartbeat. Lightheadedness and dizziness will likely improve over time.
Digestive System Effects
Your gastrointestinal system may also experience side effects caused by methadone. Most of these effects will improve over time and include dry mouth, nausea, vomiting, diarrhea, constipation and loss of appetite. Constipation is a common side effect associated with narcotic medications, because narcotics slow the functioning of your intestines. Stool softeners may help relieve your constipation. Always alert your doctor if you are having these troublesome effects.
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