Class Name(s):

• 28:08.12 Opioid Partial Agonists

Pronunciation:

• (byoo pre nor' feen)

Brand Name(s):

• Subutex^®¶; also available generically

WHY is this medicine prescribed?

Buprenorphine is used to treat opioid dependence (addiction to opioid drugs, including heroin and narcotic painkillers). Buprenorphine is in a class of medications called opioid partial agonists. It works to prevent withdrawal symptoms when someone stops taking opioid drugs.

HOW should this medicine be used?

Buprenorphine comes as a sublingual (under the tongue) tablet. Take once a day. Take buprenorphine at around the same time every day.

Take buprenorphine exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Place the sublingual tablet under your tongue until it completely melts. If you are taking more than two tablets, either place them all under your tongue at the same time or place them under your tongue up to two at a time. Do not chew the tablets or swallow them whole. Do not eat, drink, or talk until the tablet dissolves completely. After the sublingual tablets have dissolved completely, take a sip of water, swish it around your teeth and gums, and then swallow. Do not brush your teeth for at least one hour after the tablets have dissolved.

You will start on a low dose of buprenorphine and your doctor will adjust your dose over the first few days based on your response. Once you have been taking buprenorphine for a while, your doctor may increase or decrease your dose if needed based on how the medication is working.

Do not stop taking buprenorphine without talking to your doctor. If you suddenly stop taking buprenorphine, you may experience withdrawal symptoms such as hot or cold flushes, restlessness, teary eyes, runny nose, sweating, chills, muscle pain, vomiting, or diarrhea. Your doctor will probably decrease your dose gradually.

Are there OTHER USES for this medication?

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

What SPECIAL PRECAUTIONS should I follow?

Before taking buprenorphine,

• tell your doctor or pharmacist if you are allergic to this medication, any part of this medication, or any other medications, foods or substances. Tell your doctor or pharmacist about the allergy and what symptoms you had.
• you should know that some medications should not be taken with buprenorphine. Other medications may cause dosing changes or extra monitoring when taken with buprenorphine. Make sure you have discussed any medications you are currently taking or plan to take before starting buprenorphine with your doctor and pharmacist. Before starting, stopping, or changing any medications while taking buprenorphine, please get the advice of your doctor or pharmacist.
• you should know the following nonprescription or herbal products may interact with buprenorphine: St. John's wort and tryptophan. Be sure to let your doctor and pharmacist know that you are taking these medications before you start taking buprenorphine. Do not start any of these medications while taking buprenorphine without discussing with your healthcare provider.
• tell your doctor or pharmacist if you are taking the following medications or have stopped taking them within the past two weeks: isocarboxazid, linezolid, methylene blue, phenelzine, selegiline, or tranylcypromine.
• tell your doctor if you drink or have ever drunk large amounts of alcohol or have or have ever had prolonged QT syndrome (condition that increases the risk of developing an irregular heartbeat that may cause loss of consciousness or sudden death). Also, tell your doctor if you have or have ever had low levels of potassium or magnesium in the blood; heart failure; a slow or irregular heartbeat; adrenal problems such as Addison's disease (condition in which the adrenal gland produces less hormone than normal); benign prostatic hypertrophy (BPH, enlargement of the prostate gland); difficulty urinating; a head injury; depression or other mental illness; a curve in the spine that makes it hard to breathe; gallbladder disease; liver disease, including hepatitis B or C; chronic obstructive pulmonary disease (COPD; a group of diseases that affect the lungs and airways); sleep apnea, tooth problems, including a history of cavities; or thyroid, kidney, or lung disease.
• tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking buprenorphine, call your doctor. If you take buprenorphine regularly during your pregnancy, your baby may experience life-threatening withdrawal symptoms after birth. Tell your baby's doctor right away if your baby experiences any of the following symptoms: irritability, seizures, uncontrollable shaking of a part of the body, vomiting, diarrhea, or failure to gain weight.
• you should know that this medication may decrease fertility in men and women. Talk to your doctor about the risks of taking buprenorphine.
• tell your doctor if you are breastfeeding. Tell your baby's doctor right away if your baby is sleepier than usual or has trouble breathing while you are taking this medication.
• if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking buprenorphine.
• you should know that buprenorphine may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.
• you should not drink alcohol or use street drugs during your treatment. Drinking alcohol, taking prescription or nonprescription medications that contain alcohol, or using street drugs during your treatment with buprenorphine increases the risk that you will experience serious and life threatening breathing problems.
• you should know that buprenorphine may cause dizziness, lightheadedness, and fainting when you get up too quickly from a lying position. This is more common when you first start taking buprenorphine. To avoid this problem, get out of bed slowly, resting your feet on the floor for a few minutes before standing up.
• you should know that buprenorphine may cause serious problems with your teeth, including dental cavities, dental infections, tooth fracture, and tooth loss. Be sure to have regular dental checkups during your treatment with buprenorphine and call your dentist immediately if you have a toothache, mouth pain, or any other problems with your teeth or gums.

What SPECIAL DIETARY instructions should I follow?

Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medication.

What should I do IF I FORGET to take a dose?

Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

What SIDE EFFECTS can this medicine cause?

Buprenorphine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• headache
• stomach pain
• constipation
• difficulty falling asleep or staying asleep
• mouth numbness or redness
• tongue pain
• sweating
• swelling of the hands, feet, ankles, or lower legs

Some side effects can be serious. If you experience any of these symptoms or those listed in the SPECIAL PRECAUTIONS, call your doctor immediately:

• hives, rash, itching, difficulty breathing or swallowing; or swelling of your face, throat, tongue, lips, or eyes
• agitation, hallucinations (seeing things or hearing voices that do not exist), fever, sweating, confusion, fast heartbeat, shivering, severe muscle stiffness or twitching, loss of coordination, nausea, vomiting, or diarrhea
• yellowing of the skin or eyes, dark-colored urine, light-colored stools, loss of appetite, nausea, or pain in the upper right part of the stomach
• nausea, vomiting, loss of appetite, weakness, or dizziness
• inability to get or keep an erection, irregular menstruation, decreased sexual desire
• slowed breathing, upset stomach extreme tiredness, confusion, blurred vision, slurred speech, lack of energy

Buprenorphine may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online (http://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).

What should I do in case of OVERDOSE?

In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at http://www.poisonhelp.org/help. If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911.

While taking buprenorphine, you should talk to your doctor about having a rescue medication (naloxone, nalmefene) readily available (e.g., home, office). Rescue medication used to reverse the life-threatening effects of an overdose. It works by blocking the effects of opiates to relieve dangerous symptoms caused by high levels of opiates in the blood. Your doctor may also prescribe you naloxone or nalmefene if you are living in a household where there are small children or someone who has abused street or prescription drugs. Ask your doctor about other ways that you can obtain naloxone or nalmefene (as a prescription, directly from a pharmacy, or as part of a community based program). You should make sure that you and your family members, caregivers, or the people who spend time with you know how to recognize an overdose, how to use the rescuce medication, and what to do until emergency medical help arrives. Your doctor or pharmacist will show you and your family members how to use the medication. Ask your pharmacist for the instructions or visit the manufacturer's website to get the instructions. If symptoms of an overdose occur, a friend or family member should give the first dose of rescue medication, call 911 immediately, and stay with you and watch you closely until emergency medical help arrives. Your symptoms may return within a few minutes after you receive rescue medication. If your symptoms return, the person should give you another dose of naloxone or nalmefene. Additional doses may be given every 2 to 3 minutes, if symptoms return before medical help arrives.

Symptoms of overdose may include:

• narrowing of the pupils (black circles in the center of the eye)
• sleepiness or extreme drowsiness
• slow or shallow breathing
• difficulty breathing
• unable to respond or wake up

What should I know about STORAGE and DISPOSAL of this medication?

Keep this medication in the container it came in, tightly closed, and out of reach of children. Buprenorphine can be a target for people who abuse prescription medications or street drugs. Store it at room temperature and away from excess heat and moisture (not in the bathroom).

Store buprenorphine in a safe place so that no one else can take it accidentally or on purpose.

You must immediately dispose of any medication that is outdated or no longer needed through a medicine take-back program. If you do not have a take-back program nearby or one that you can access promptly, then dispose of unneeded tablets by removing them from the packaging and flushing them down the toilet. Visit the FDA's Safe Disposal of Medicines website http://goo.gl/c4Rm4p for more information.

Keep all medication out of sight and reach of children as many containers are not child-resistant. Always lock safety caps. Place the medication in a safe location - one that is up and away and out of their sight and reach. http://www.upandaway.org

What OTHER INFORMATION should I know?

Keep all appointments with your doctor, dentist, and the laboratory. Your doctor will order certain lab tests to check your body's response to buprenorphine.

Before having any laboratory test (especially those that involve methylene blue), tell your doctor and the laboratory personnel that you are taking buprenorphine.

In case of an emergency, you or a family member should tell the treating doctor or emergency room staff that you are taking buprenorphine.

Do not inject buprenorphine sublingual tablets. Severe reactions may happen, including withdrawal symptoms.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

Keep a written list of all of the prescription and nonprescription (over-the-counter) medicines, vitamins, minerals, and dietary supplements you are taking. Bring this list with you each time you visit a doctor or if you are admitted to the hospital. You should carry the list with you in case of emergencies.

^¶ This branded product is no longer on the market. Generic alternatives may be available.

This report on medications is for your information only, and is not considered individual patient advice. Because of the changing nature of drug information, please consult your physician or pharmacist about specific clinical use.

The American Society of Health-System Pharmacists, Inc. represents that the information provided hereunder was formulated with a reasonable standard of care, and in conformity with professional standards in the field. The American Society of Health-System Pharmacists, Inc. makes no representations or warranties, express or implied, including, but not limited to, any implied warranty of merchantability and/or fitness for a particular purpose, with respect to such information and specifically disclaims all such warranties. Users are advised that decisions regarding drug therapy are complex medical decisions requiring the independent, informed decision of an appropriate health care professional, and the information is provided for informational purposes only. The entire monograph for a drug should be reviewed for a thorough understanding of the drug's actions, uses and side effects. The American Society of Health-System Pharmacists, Inc. does not endorse or recommend the use of any drug. The information is not a substitute for medical care.

AHFS^® Patient Medication Information™ Copyright, 2026. The American Society of Health-System Pharmacists^®, 4500 East-West Highway, Suite 900, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.

Selected Revisions: October 15, 2026.