This medication is a narcotic pain reliever and is used for severe pain. It is also used in the treatment of narcotic addiction as part of an approved program. Methadone is a potent narcotic substance. It can cause serious side effects and toxic reactions if used by someone other than the person for whom it is prescribed. Do not share this medication with others.

Methadone is a synthetic narcotic. Patients who are physically dependent on narcotics may have withdrawal symptoms if given the usual dose of a narcotic antagonist (e.g., naloxone, naltrexone). If a narcotic antagonist must be given, the dose must be smaller than the usual dose and it must be given with extreme care.

Withdrawal symptoms may also be caused by using certain narcotics (partial agonist/antagonists such as pentazocine, butorphanol, nalbuphine) after using methadone. Tell your doctor immediately if you develops symptoms such as anxiety, agitation, and diarrhea.

How Methadone works

Methadone is a synthetic drug that produces effects similar to morphine although the feeling of euphoria (extreme happiness) is less than that experienced with morphine.

Doses are very slowly reduced until the patient does not need Methadone any more (total withdrawal). This process can take some time.

If taken for long periods of time, methadone can be addictive.

http://my.webmd.com/drugs/mono-1194-METHADONE+-+DISPERSIBLE+TABLET.aspx?drugid=2671&drugname=Methadone+Oral

http://www.medsafe.govt.nz/consumers/cmi/m/Methadone%20syrup.htm

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