Naltrexone and Bupropion

Adult Medication

Brand Names: US



  • Children and teens who take this drug may be at a greater risk of having thoughts or actions of suicide. Adults may also be at risk. The risk may be greater in people who have had these thoughts or actions in the past. Watch people who take this drug closely. Call the doctor right away if signs like low mood (depression), nervousness, restlessness, grouchiness, panic attacks, or changes in mood or actions are new or worse. Call the doctor right away if any thoughts or actions of suicide occur.
  • This drug is not approved for use in children. Talk with the doctor.
  • This drug is not approved to treat mental or mood problems like low mood (depression) or to help stop smoking. When another bupropion drug was used to stop smoking, mental or mood problems happened or got worse. Talk with the doctor.

What is this drug used for?

  • It is used to help you lose weight.

What do I need to tell my doctor BEFORE I take this drug?

  • If you have an allergy to this drug or any part of this drug.
  • If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
  • If you have ever had seizures.
  • If you drink a lot of alcohol and you stop drinking all of a sudden.
  • If you use certain other drugs like drugs for seizures or anxiety and you stop using them all of a sudden.
  • If you have an eating problem, high blood pressure, or kidney problems.
  • If you have taken certain drugs used for low mood (depression) like isocarboxazid, phenelzine, or tranylcypromine or drugs used for Parkinson’s disease like selegiline or rasagiline in the last 14 days. Taking this drug within 14 days of those drugs can cause very bad high blood pressure.
  • If you are taking carbamazepine, efavirenz, linezolid, lopinavir, methylene blue, phenobarbital, phenytoin, ritonavir, or another drug that has the same drug in it.
  • If you take drugs like methadone or buprenorphine to help you stop taking an opioid drug.
  • If you are taking an opioid drug on a regular basis, are addicted to an opioid drug, or are having withdrawal signs.
  • If you have taken a pain drug within the past 7 to 10 days.
  • If you are pregnant or may be pregnant. Do not take this drug if you are pregnant.
  • If you are breast-feeding. Do not breast-feed while you take this drug.
  • If the patient is a child. Do not give this drug to a child.
This is not a list of all drugs or health problems that interact with this drug.
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take this drug with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take this drug?

  • Tell all of your health care providers that you take this drug. This includes your doctors, nurses, pharmacists, and dentists.
  • Follow the diet and workout plan that your doctor told you about.
  • This drug may affect certain lab tests. Tell all of your health care providers and lab workers that you take this drug.
  • This drug may cause high blood pressure.
  • Check blood pressure and heart rate as the doctor has told you. Talk with the doctor.
  • If you have high blood sugar (diabetes), you will need to watch your blood sugar closely.
  • This drug may raise the chance of seizures. The chance may be higher in people who have certain health problems, use certain other drugs, or drink a lot of alcohol. Talk to your doctor to see if you have a greater chance of seizures while taking this drug.
  • Talk with your doctor before you drink alcohol or use other drugs and natural products that slow your actions.
  • Some people may have a higher chance of eye problems with this drug. Your doctor may want you to have an eye exam to see if you have a higher chance of these eye problems. Call your doctor right away if you have eye pain, change in eyesight, or swelling or redness in or around the eye.
  • Talk with your doctor before taking opioid drugs like some cough and cold products, some diarrhea drugs, and some pain drugs. These drugs may not work as well. Do not take more of these drugs to try to get them to work better. Doing this may cause very bad injury, coma, or death. Talk with your doctor.
  • People taking this drug may get more effects from opioid drugs when this drug is stopped. Even low doses of opioid drugs may cause very bad and sometimes deadly effects in these people. Talk with your doctor.
  • If you are addicted to pain drugs and are given this drug, you may have signs of withdrawal. Talk with your doctor.
  • If you are 65 or older, use this drug with care. You could have more side effects.
  • This drug may cause harm to the unborn baby if you take it while you are pregnant. If you are pregnant or you get pregnant while taking this drug, call your doctor right away.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
  • Signs of high blood pressure like very bad headache or dizziness, passing out, or change in eyesight.
  • Hallucinations (seeing or hearing things that are not there).
  • Restlessness.
  • Seizures.
  • Chest pain or pressure or a fast heartbeat.
  • A heartbeat that does not feel normal.
  • Swollen gland.
  • Muscle or joint pain.
  • Shortness of breath.
  • Fever.
  • A very bad skin reaction (Stevens-Johnson syndrome/toxic epidermal necrolysis) may happen. It can cause very bad health problems that may not go away, and sometimes death. Get medical help right away if you have signs like red, swollen, blistered, or peeling skin (with or without fever); red or irritated eyes; or sores in your mouth, throat, nose, or eyes.

What are some other side effects of this drug?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
  • Dizziness.
  • Headache.
  • Upset stomach or throwing up.
  • Hard stools (constipation).
  • Dry mouth.
  • Loose stools (diarrhea).
  • Not able to sleep.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to your national health agency.

How is this drug best taken?

Use this drug as ordered by your doctor. Read all information given to you. Follow all instructions closely.
  • Take with or without food.
  • Avoid taking this drug with high-fat meals.
  • Swallow whole. Do not chew, break, or crush.
  • If you have trouble swallowing, talk with your doctor.
  • To gain the most benefit, do not miss doses.
  • Keep taking this drug as you have been told by your doctor or other health care provider, even if you feel well.
  • Do not take this drug more often than you are told. This may raise the risk of seizures. Be sure you know how far apart to take your doses.

What do I do if I miss a dose?

  • Skip the missed dose and go back to your normal time.
  • Do not take 2 doses at the same time or extra doses.

How do I store and/or throw out this drug?

  • Store at room temperature.
  • Store in a dry place. Do not store in a bathroom.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Check with your pharmacist about how to throw out unused drugs.

General drug facts

  • If your symptoms or health problems do not get better or if they become worse, call your doctor.
  • Do not share your drugs with others and do not take anyone else’s drugs.
  • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
  • Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
  • Some drugs may have another patient information leaflet. If you have any questions about this drug, please talk with your doctor, nurse, pharmacist, or other health care provider.
  • If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Consumer Information Use and Disclaimer

This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from the healthcare provider. You must talk with the healthcare provider for complete information about the risks and benefits of using this medicine.

Last Reviewed Date



© 2016 Wolters Kluwer Clinical Drug Information, Inc. and its affiliates and/or licensors. All rights reserved.