Skip to Content



PDF options:  View Fullscreen   Download PDF

PDF Transcript

Taking other medicines


Subutex® 8mg Sublingual Tablets
(buprenorphine hydrochloride)
Subutex Sublingual Tablets are available in the following strengths: 0.4mg, 2mg and 8mg.
Subutex 8mg Sublingual Tablets will be referred to as Subutex throughout this leaflet.
Read all of this leaflet carefully before you start taking this medicine.
• Keep this leaflet. You may need to read it again.
• If you have any further questions, ask your doctor or pharmacist.
• This medicine has been prescribed for you. Do not pass it on to others. It may harm them,
even if their symptoms are the same as yours.
• If any of the side effects gets serious, or if you notice any side effects not listed in this
leaflet, please tell your doctor or pharmacist.


this leaflet:
What Subutex is and what it is used for
Before you take Subutex
How to take Subutex
Possible side effects
How to store Subutex
Further information





Subutex is used to treat dependence on opiate (narcotic) drugs, such as morphine and heroin in
drug addicts who have agreed to be treated for their addiction.
Subutex is used in adults and adolescents over 16 years of age who are also receiving medical,
social and psychological support.

Some medicines may increase the side effects of Subutex and may sometimes cause very
serious reactions. Do not take any other medicines whilst taking Subutex without first talking to
your doctor, especially:
• Benzodiazepines (used to treat anxiety or sleep disorders) such as diazepam, temazepam,
alprazolam. Your doctor will prescribe the correct dose for you. Taking the wrong dose of
benzodiazepines may cause death due to respiratory failure (inability to breathe).
• Other medicines that may make you feel sleepy which are used to treat illnesses such
as anxiety, sleeplessness, convulsions/seizures, pain. These types of medicines will reduce
your alertness levels making it difficult for you to drive and use machines. They may also
cause central nervous system depression, which is very serious. Below is a list of examples
of these types of medicines:
• other opioid containing medicines such as methadone, certain pain killers and cough
• antidepressants (used to treat depression) such as isocarboxazide, phenelzine,
selegeline, tranylcypromine, and valproate may increase the effects of this medicine.
• sedative H1 receptor antagonists (used to treat allergic reactions) such as
diphenhydramine and chlorphenamine.
• barbiturates (used to cause sleep or sedation) such as phenobarbital, secobarbital.
• tranquilisers (used to cause sleep or sedation) such as chloral hydrate.
• Naltrexone may prevent Subutex from working. If you take naltrexone whilst you are taking
Subutex you may experience a sudden onset of prolonged and intense withdrawal
• Clonidine (used to treat high blood pressure) may extend the effects of this medicine.
• Anti-retrovirals (used to treat AIDS) such as ritonavir, nelfinavir, indinavir may increase the
effects of this medicine.
• Some antifungal agents (used to treat fungal infections) such as ketoconazole and
itraconazole and certain antibiotics (macrolide) may extend the effects of this medicine.
• Some medicines may decrease the effect of Subutex. These include medicines used to treat
epilepsy (such as carbamazepine and phenytoin) and medicines used to treat tuberculosis
To get the greatest benefit from taking Subutex, you must tell your doctor about all the
medicines you are taking, including alcohol, medicines containing alcohol, street drugs, and
any prescription medicine you are taking that has not been prescribed for you by your

Do not take Subutex:

If you are a child under the age of 16 years.
If you are allergic (hypersensitive) to buprenorphine or to any of the other ingredients of
this medicine (listed in section 6).
If you have serious breathing problems.
If you have serious problems with your liver.
If you are intoxicated due to alcohol or have trembling, sweating, anxiety confusion or
hallucinations caused by alcohol.
If you are breast-feeding a baby.

Take special care with Subutex

Tell your doctor before you start taking Subutex if you have:
• asthma or other breathing problems
• any liver disease such as hepatitis
• low blood pressure
• recently suffered head injury or brain disease
• a urinary disorder (especially linked to enlarged prostate in men)
• any kidney disease
• thyroid problems
• adrenocortical disorder (e.g. Addison’s disease)

Important things to be aware of:
• Misuse, abuse and diversion

This medicine can be a target for people who abuse prescription medicines, and should be
kept in a safe place to protect it from theft. Do not give this medicine to anyone else. It
can cause death or otherwise harm them.

Breathing problems


Withdrawal symptoms

Some people have died from respiratory failure (inability to breathe) because they misused
this medicine or took it in combination with other central nervous system depressants, such
as alcohol, benzodiazepines (tranquilisers), or other opioids.
This product can cause dependence.

This product can cause withdrawal symptoms if you take it less than 6 hours after you use a
short-acting opioid (e.g. morphine, heroin) or less than 24 hours after you use a long-acting
opioid such as methadone.
Subutex can also cause withdrawal symptoms if you stop taking it abruptly.

Liver damage

Liver damage has been reported after taking Subutex, especially when the medicine is
misused. This could also be due to viral infections (chronic hepatitis C), alcohol abuse,
anorexia or use of other medicines with the ability to harm your liver (see section 4).
Regular blood tests may be conducted by your doctor to monitor the condition of
your liver. Tell your doctor if you have any liver problems before you start
treatment with Subutex.

Blood pressure

This product may cause your blood pressure to drop suddenly, causing you to feel dizzy if
you get up too quickly from sitting or lying down.

Diagnosis of unrelated medical conditions

This medicine may mask pain symptoms that could assist in the diagnosis of some diseases.
Do not forget to advise your doctor if you take this medicine.

Taking Subutex with food and drink

Alcohol may increase drowsiness and may increase the risk of respiratory failure (inability to
breathe) if taken with Subutex. Do not take Subutex together with alcohol. Do not swallow
or consume food or drink until the tablet is completely dissolved.

Pregnancy and breast-feeding

Tell your doctor if you are pregnant or intend to become pregnant.
When taken during pregnancy, particularly late pregnancy, medicines like Subutex may cause
drug withdrawal symptoms including problems with breathing in your new born baby. These
symptoms may occur several days after birth.
Do not breast-feed your baby whilst taking this medicine as Subutex passes into breast milk.
Ask your doctor or pharmacist for advice before taking any medicine.

Driving and using machines

If you feel drowsy or dizzy while taking these tablets do not use machinery.
The medicine can affect your ability to drive as it may make you sleepy or dizzy.
• Do not drive while taking this medicine until you know how it affects you.
• It is an offence to drive if this medicine affects your ability to drive.
• However, you would not be committing an offence if:
• The medicine has been prescribed to treat a medical or dental problem and
• You have taken it according to the instructions given by the prescriber or in the
information provided with the medicine and
• It was not affecting your ability to drive safely
Talk to your doctor or pharmacist if you are not sure whether it is safe for you to drive while
taking this medicine.

Important information about some of the ingredients of Subutex

Subutex contains lactose monohydrate. If you have been told by your doctor that you have an
intolerance to some sugars, contact your doctor before taking this medicine.



You must place the tablet under your tongue (sublingual) and allow it to dissolve, which will
take 5 to 10 minutes. This is the only way to take the tablets. Do not chew or swallow them
whole, as they will not work.
Your doctor will tell you how many tablets to take and you should always follow this advice.
To avoid sudden withdrawal symptoms, treatment with Subutex should be given when there are
already clear signs of withdrawal symptoms.

Adults and children over the age of 16 years: when beginning treatment the dose is

between 0.8 to 4mg, taken once a day.

For drug addicts who have not had any withdrawal treatment: one dose of Subutex
should be taken at least 6 hours after the last use of the opioid (narcotic such as morphine or
heroin), or when the first signs of craving appear. If you take it less than six hours after you use
a narcotic you may get withdrawal symptoms.

Page 1 of 2

For patients taking methadone: before beginning treatment, your doctor should reduce
your dose of methadone to not more than 30mg a day. Subutex may cause withdrawal
symptoms in patients who are dependent on methadone if used within 24 hours of the last dose
of methadone.
During your treatment, your doctor may increase your dose of Subutex, to a maximum single
daily dose of 32mg, depending upon your response. Once you have been stable for a while,
your doctor will gradually reduce your dose and it may be possible to stop it altogether. Do not
suddenly stop taking the tablets, as this may cause withdrawal symptoms.

If you take more Subutex than you should

If you or someone else takes too much of this medicine, you must go or be taken immediately
to an emergency centre or hospital as overdose with Subutex may cause serious and lifethreatening breathing problems.

If you forget to take Subutex

Tell your doctor as soon as possible if you miss a dose and follow his or her instructions. Do not
take a double dose to make up for the forgotten dose.

If you stop taking Subutex

Do not change the treatment in any way or stop treatment without the agreement of the doctor
who is treating you. Stopping treatment suddenly may cause withdrawal symptoms.
If you have any further questions on the use of this product, ask your doctor or pharmacist.

How to remove the tablet from the blister pack

If any of the side effects gets serious, or if you notice any side effects not listed in this leaflet,
please tell your doctor or pharmacist.

Reporting of side effects

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible
side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card
Scheme at:
By reporting side effects you can help provide more information on the safety of this medicine.




Keep out of the sight and reach of children.
Do not store above 30°C.
Store in the original package.
Do not use after the date which is shown on the pack.
If you tablets appear discoloured, or show any other signs of deterioration, take them back
to your pharmacist who will advise you.
Take any unused medicine back to your pharmacist for safe disposal.


What Subutex contains

Each sublingual tablet contains 8.64mg buprenorphine hydrochloride, equivalent to 8mg
buprenorphine base as the active ingredient, along with the following inactive ingredients:
lactose monohydrate, mannitol, maize starch, povidone K30, citric acid anhydrous,
sodium citrate and magnesium stearate.

What Subutex looks like and contents of the pack

Each uncoated, white, oval tablet has the markings ‘B8’ on one side and the sword logo on the
other side.
Subutex is available in packs containing 7 tablets.


Your tablets are manufactured by:
Schering-Plough, Levallois-Perret Cedex, France.
Schering-Plough, 2 rue Louis Pasteur, 14200 Herouville-Saint-Clair, France.
1 – Remove just one section from the blister pack, tearing it along the
perforated line.

Procured from within the EU and repackaged by:
Doncaster Pharmaceuticals Group Ltd., Kirk Sandall, Doncaster, DN3 1QR.
Product Licence holder: BR Lewis Pharmaceuticals Ltd., Kirk Sandall, Doncaster, DN3 1QR.
PL No: 08929/0423

2 – Starting from the edge where the seal is lifted, pull back the foil on
the back to remove the tablet.




Leaflet revision and issue date (Ref): 22.04.16
Subutex® is a registered trademark of Indivior UK Limited.


Like all medicines, Subutex can cause side effects, although not everybody gets them.
Tell your doctor immediately or seek urgent medical attention if you experience side
effects such as:
• sudden wheezing, difficulty breathing, swelling of the eyelids, face, tongue, lips, throat or
hands; rash or itching especially those covering your whole body. These may be signs of a
life-threatening allergic reaction.
• if you start to breathe more slowly or weakly than expected (respiratory depression).
• if you start to feel faint, as this may be a sign of low blood pressure.
Also tell your doctor immediately if you experience side effects such as:
• severe fatigue (tiredness), have no appetite or if your skin or eyes look yellow. These may
be symptoms of liver damage.
The frequency of possible side effects listed below is defined using the following convention:
• very common (affects more than 1 user in 10)
• common (affects 1 to 10 users in 100)
• not known (frequency cannot be estimated from the available data).

Side effects reported with Subutex
Very common side effects:

Drug withdrawal syndrome, headache, hyperhidrosis (sweating), insomnia (inability to sleep),
nausea (feeling sick), pain

Common side effects:

Abdominal pain, agitation, anxiety, joint pain, weakness, back pain, bone pain, bronchitis,
chest pain, chills, constipation, cough, decreased appetite, depression, diarrhoea, dizziness,
dry mouth, painful period, indigestion, shortness of breath, flatulence, gastrointestinal disorder,
hostility, increase in muscle tension, infection, influenza, nervousness, tearing (watery eyes)
disorder, swollen glands (lymph nodes), malaise, migraine, muscle spasms, muscle pain,
dilation of the pupil, neck pain, palpitations, paranoia, burning or tingling in hands and feet,
swelling (hands and feet), sore throat and painful swallowing, fever, rash, somnolence, syncope
(fainting), thinking abnormal, tooth disorder, tremor, flushing, vomiting (being sick), yawning

Frequency not known:

Drug dependence, drug withdrawal syndrome in newborn, hallucinations (sensing things that
are not real), drop in blood pressure on changing position from sitting or lying down to
standing, difficulty in urinating
Misusing this medicine by injecting it can cause withdrawal symptoms, infections, other skin
reactions and potentially serious liver problems

Page 2 of 2

+ Expand Transcript

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.