This medication contains 2 medicines: buprenorphine and naloxone. It is used to treat opioid use disorder. Buprenorphine belongs to a class of drugs called mixed opioid agonist-antagonists. Buprenorphine helps prevent withdrawal symptoms caused by stopping other opioids.

Naloxone is an opioid antagonist that blocks the effect of opioids and can cause severe opioid withdrawal when injected. It has little effect when taken by mouth or dissolved under the tongue. It is combined with buprenorphine to prevent abuse and misuse (injection) of this medication. This combination medication is used as part of a complete treatment program for opioid use disorder (such as compliance monitoring, counseling, behavioral contract, lifestyle changes).

Ask your doctor or pharmacist if you should have other forms of naloxone available to treat opioid overdose. Teach your family or household members about the signs of an opioid overdose and how to treat it.

Read the Medication Guide provided by your pharmacist before you start taking buprenorphine/naloxone and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

There are different brands and forms of this medication available. Because different products may contain different amounts of buprenorphine and naloxone, do not change brands or dosage forms without consulting your doctor or pharmacist.

Use this medication during your treatment maintenance period as directed by your doctor, usually once daily. Place the medication under your tongue for 5 to 10 minutes and let it dissolve completely. If you are prescribed more than one tablet each day, you may place all of the tablets under your tongue at once or place two tablets at a time under your tongue. Do not swallow or chew this medication. It will not work as well.

After the medication is fully dissolved, take a large sip of water and swish gently around your teeth and gums, and then swallow the water. This will help to prevent problems with your teeth. Do not brush your teeth for at least one hour after using this medication.

For most patients, buprenorphine alone is usually used for the first 2 days after you have stopped all other opioids. It is usually given in your doctor's office. Your doctor will then switch you to this combination buprenorphine/naloxone medication for maintenance treatment. The combination with naloxone works the same way as buprenorphine alone to prevent withdrawal symptoms. For some patients, this combination product may be used to start treatment (called induction). Follow your doctor's directions carefully.

The dosage is based on your medical condition and response to treatment. Do not increase your dose, take the medication more often, or take it for a longer time than prescribed. Properly stop the medication when so directed.

Use this medication regularly in order to get the most benefit from it. To help you remember, use it at the same time each day.

Buprenorphine/naloxone may cause withdrawal symptoms especially if you use it soon after using opioids such as heroin, morphine, or methadone. Follow your doctor's instructions for your treatment plan.

If you suddenly stop using this medication, you may have withdrawal symptoms (such as restlessness, watering eyes, runny nose, nausea, sweating, muscle aches). To help prevent withdrawal, your doctor may lower your dose slowly. Withdrawal is more likely if you have used this medication for a long time or in high doses. Tell your doctor or pharmacist right away if you have withdrawal.

Do not inject ("shoot up") buprenorphine/naloxone or inhale it through the nose ("snort"). Doing so is dangerous, and will likely cause severe withdrawal symptoms (see Side Effects section) due to the naloxone in this medication, especially if you have been using opioids such as heroin, morphine or methadone. Consult your doctor or pharmacist for more details.

Tell your doctor right away if you experience any withdrawal reactions.

Drowsiness, dizziness, constipation, or headache may occur. If any of these effects last or get worse, tell your doctor or pharmacist right away.

To prevent constipation, eat dietary fiber, drink enough water, and exercise. You may also need to take a laxative. Ask your pharmacist which type of laxative is right for you.

To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.

Remember that this medication has been prescribed because your doctor 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.

Severe (possibly fatal) breathing problems can occur if this medication is abused, injected, or mixed with other depressants (such as alcohol, benzodiazepines including diazepam, other opioids).

Tell your doctor right away if you have any serious side effects, including:

• interrupted breathing during sleep (sleep apnea)
• mental/mood changes (such as agitation, confusion, hallucinations)
• stomach/abdominal pain
• tooth/gum pain
• signs of your adrenal glands not working well (such as unusual tiredness, weight loss)

Although this medication is used to prevent withdrawal reactions, it may rarely cause opioid withdrawal symptoms, including diarrhea, severe mental/mood changes (such as anxiety, irritability, trouble sleeping), muscle stiffness or shakiness. This is more likely when you first start treatment or if you have been using long-acting opioids such as methadone. If such symptoms occur, notify your doctor or pharmacist right away.

Get medical help right away if you have any very serious side effects, including:

• fainting
• fast/irregular heartbeat
• severe dizziness
• slow/shallow breathing
• unusual drowsiness/difficulty waking up

This drug may rarely cause serious liver disease. Get medical help right away if you have any symptoms of liver damage, including:

• nausea/vomiting that doesn't stop
• dark urine
• loss of appetite
• yellowing eyes/skin
• severe stomach/abdominal pain

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

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Before taking this medication, tell your doctor or pharmacist if you are allergic to buprenorphine or naloxone; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of:

• brain disorders (such as head injury, tumor, seizures)
• breathing problems (such as asthma, sleep apnea, chronic obstructive pulmonary disease-COPD)
• liver disease
• mental/mood disorders (such as confusion, depression)
• stomach/intestinal problems (such as blockage, constipation, diarrhea due to infection, paralytic ileus)
• difficulty urinating (such as due to enlarged prostate)

This drug may make you dizzy or drowsy. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis). Alcohol also increases your risk for breathing problems.

Buprenorphine may cause a condition that affects the heart rhythm (QT prolongation). QT prolongation can rarely cause serious (rarely fatal) fast/irregular heartbeat and other symptoms (such as severe dizziness, fainting) that need medical attention right away.

The risk of QT prolongation may be increased if you have certain medical conditions or are taking other drugs that may cause QT prolongation. Before using buprenorphine, tell your doctor or pharmacist of all the drugs you take and if you have any of the following conditions:

• certain heart problems (heart failure, slow heartbeat, QT prolongation in the EKG)
• family history of certain heart problems (QT prolongation in the EKG, sudden cardiac death)

Low levels of potassium or magnesium in the blood may also increase your risk of QT prolongation. This risk may increase if you use certain drugs (such as diuretics/"water pills") or if you have conditions such as severe sweating, diarrhea, or vomiting. Talk to your doctor about using buprenorphine safely.

This medicine may contain aspartame. If you have phenylketonuria (PKU) or any other condition that requires you to restrict your intake of aspartame (or phenylalanine), consult your doctor or pharmacist about using this drug safely.

Some people using this medication may have dental problems (such as tooth decay/loss, cavities, infection). Schedule a visit to the dentist soon after starting this medication and tell your dentist that you are using this medication. To help prevent dental problems, have regular dental exams and learn how to keep your teeth and gums healthy. If you have tooth or gum pain, tell your doctor and dentist right away.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Older adults may be more sensitive to the side effects of this drug, especially slow/shallow breathing, drowsiness, and QT prolongation (see above).

Before using this medication, women of childbearing age should talk with their doctor(s) about the risks and benefits. Tell your doctor if you are pregnant or if you plan to become pregnant. During pregnancy, this medication should be used only when clearly needed. It may slightly increase the risk of birth defects if used during the first two months of pregnancy. Also, using it for a long time or in high doses near the expected delivery date may harm the unborn baby. To lessen the risk, use the smallest effective dose for the shortest possible time. Tell the doctor right away if you notice any symptoms in your newborn baby such as slow/shallow breathing, irritability, abnormal/nonstop crying, vomiting, or diarrhea.

Buprenorphine passes into breast milk. It is unknown if naloxone passes into breast milk. This product may rarely have undesirable effects on a nursing infant. Tell the doctor right away if your baby develops unusual sleepiness, difficulty feeding, or trouble breathing. Consult your doctor before breastfeeding.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products that may interact with this medication include:

• certain pain medications (mixed opioid agonist-antagonists such as butorphanol, nalbuphine, pentazocine)
• naltrexone
• samidorphan

The risk of serious side effects (such as slow/shallow breathing, severe drowsiness/dizziness) may be increased if this medication is used with other products that may also affect breathing or cause drowsiness. Tell your doctor or pharmacist if you are taking other products such as alcohol, marijuana (cannabis), antihistamines (such as cetirizine, diphenhydramine), drugs for sleep or anxiety (such as alprazolam, diazepam, zolpidem), muscle relaxants (such as carisoprodol, cyclobenzaprine), and other opioid pain relievers (such as codeine, hydrocodone).

Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely.

Deaths have occurred when this medication has been misused by injecting it ("shooting up"), especially when used in combination with benzodiazepines (such as diazepam) or other depressants such as alcohol or additional opioids.

If someone has overdosed and has serious symptoms such as passing out or trouble breathing, give them naloxone if available, then call 911. If the person is awake and has no symptoms, call a poison control center right away. US residents can call 1-800-222-1222. Canada residents can call 1-844-764-7669. Symptoms of overdose may include: slow/shallow breathing, slow heartbeat, coma.

Do not share this medication with others. Sharing it is against the law.

Tell all of your doctors that you use this medication and have regularly used opioids, especially in cases of emergency treatment.

Lab and/or medical tests (such as liver function) should be done while you are taking this medication. Keep all medical and lab appointments. Consult your doctor for more details.

If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.

Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. For more details, read the Medication Guide, or consult your pharmacist or local waste disposal company.