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Naltrexone Suspension for injection, Extended Release

It is used to treat certain types of drug dependence.

Generic Name: naltrexone injection

Brand Names: Vivitrol

There is an FDA Alert for this drug. Click here to view it.

What is this medicine?

NALTREXONE (nal TREX one) is used to treat certain types of drug dependence.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
  • bleeding problem like hemophilia
  • if you frequently drink alcohol containing drinks
  • kidney disease
  • liver disease
  • low platelet count
  • take medicines that treat or prevent blood clots
  • take narcotic medicines for pain or addiction
  • use illegal or street drugs
  • an unusual or allergic reaction to naltrexone, other medicines, carboxymethylcellulose, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding

How should I use this medicine?

The medicine is for injection into a muscle. It is given by a health care professional in a hospital or clinic setting.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

A special MedGuide will be given to you by the pharmacist with each prescription and refill. Be sure to read this information carefully each time.

What if I miss a dose?

It is important not to miss your dose. Call your doctor or health care professional if you are unable to keep an appointment.

What may interact with this medicine?

Do not take this medicine with any of the following medications:
  • medicines for pain like pentazocine, buprenorphine, butorphanol, nalbuphine, oxycodone, and morphine

What should I watch for while using this medicine?

Your condition will be monitored carefully while you are receiving this medicine.

Visit your doctor or health care professional regularly. It is important to attend any counseling or support groups that your doctor or health care professional recommends. Attending these sessions while you are taking this medicine will help you overcome your dependence on alcohol or narcotics (opioids). Never try to overcome the effects of the medicine by taking large amounts of narcotics (opioids) because this can cause severe problems including death. Also, you may be more sensitive to lower doses of opioids after you stop taking this medicine.

If you are going to have surgery, tell your doctor or health care professional that you are taking this medicine.

Do not treat yourself for coughs, colds, pain, or diarrhea. Ask your doctor or health care professional for advice. Some of the ingredients may interact with this medicine and cause side effects.

Wear a medical ID bracelet or chain, and carry a card that describes your disease and details of your medicine and dosage times.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.


Last Updated: October 13, 2010
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