This medication is used to treat severe ongoing pain (such as due to cancer). Methadonebelongs to a class of drugs known as opioid (narcotic) analgesics. It works in the brain to change how your body feels and responds to pain.
Do not use this medication to relieve pain that is mild or that will go away in a few days (such as pain from surgery). This medication is not for occasional (“as needed”) use.
This medication is also used to treat addiction to opioids (such as heroin) as part of an approved treatment program. It helps prevent withdrawal symptoms caused by stopping other opioids.
How to use Methadone HCL
Read the Medication Guide provided by your pharmacist before you start using methadone and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
Take this medication by mouth on a regular schedule as directed by your doctor, not as needed for sudden (breakthrough) pain. You may take this drug with or without food. If you have nausea, it may help to take this drug with food. Ask your doctor or pharmacist about other ways to decrease nausea (such as lying down for 1 to 2 hours with as little head movement as possible).
Carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. If your medication comes in an oral dosing syringe, use the syringe to measure the dose. Do not inject the medication. Before taking, mix the dose in at least 1 ounce (30 milliliters) of water or other liquid as directed. Drink all of the mixture right away. Do not prepare a supply in advance.
The dosage is based on your medical condition and response to treatment.
This medication may cause withdrawal reactions, especially if it has been used regularly for a long time or in high doses. In such cases, withdrawal symptoms (such as restlessness, watering eyes, runny nose, nausea, sweating, muscle aches) may occur if you suddenly stop using this medication. To prevent withdrawal reactions, your doctor may reduce your dose gradually. Consult your doctor or pharmacist for more details, and report any withdrawal reactions right away.
Nausea, vomiting, constipation, lightheadedness, dizziness, dry mouth, drowsiness, or sweating may occur. Some of these side effects may decrease after you have been using this medication for a while. If any of these effects persist or worsen, tell your doctor or pharmacistpromptly.
To prevent constipation, eat a diet adequate in fiber, drink plenty of water, and exercise. Consult your pharmacist for help in selecting a laxative (such as a stimulant type with stool softener).
To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as agitation, confusion, hallucinations), stomach/abdominal pain, difficulty urinating, signs of your adrenal glands not working well (such as loss of appetite, unusual tiredness, weight loss).
Get medical help right away if you have any very serious side effects, including: seizure, severe drowsiness/difficulty waking up.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.