Skip to Content

UK Edition. Click here for US version.

CLOZARIL 100MG TABLETS

Active substance(s): CLOZAPINE

PDF options:  View Fullscreen   Download PDF

PDF Transcript

Package Leaflet: Information for the user
CLOZARIL®
Clozaril 25 mg tablets
Clozaril 100 mg tablets
Clozapine
Read all of this leaflet carefully before you start taking this medicine because it contains important
information for you.
–– 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 only. Do not pass it on to others. It may harm them,
even if their signs of illness are the same as yours.
–– If you get any side effects, talk to your doctor or pharmacist. This includes any possible side
effects not listed in this leaflet. See section 4.
What is in this leaflet:
1. What Clozaril is and what it is used for
2. What you need to know before you take Clozaril
3. How to take Clozaril
4. Possible side effects
5. How to store Clozaril
6. Contents of the pack and other information
1. What Clozaril is and what it is used for
The active ingredient of Clozaril is clozapine which belongs to a group of medicines called
antipsychotics (medicines that are used to treat specific mental disorders such as psychosis).
Clozaril is used to treat people with schizophrenia in whom other medicines have not worked.
Schizophrenia is a mental illness which affects how you think, feel and behave. You should only use
this medicine if you have already tried at least two other antipsychotic medicines, including one of
the newer atypical antipsychotics, to treat schizophrenia, and these medicines did not work, or
caused severe side effects that cannot be treated.
Clozaril is also used to treat severe disturbances in the thoughts, emotions and behaviour of people
with Parkinson’s disease in whom other medicines have not worked.
2. What you need to know before you take Clozaril
Do not take Clozaril if you:
––are allergic (hypersensitive) to clozapine or any of the other ingredients of Clozaril (listed in
section 6).
––are not able to have regular blood tests.
––have ever been told you have a low white blood cell count (e.g. leucopenia or agranulocytosis),
especially if this was caused by medicines. This does not apply if you have had low white blood cell
count caused by previous chemotherapy.
––had to stop using Clozaril previously because of severe side effects (e.g. agranulocytosis or heart
problems).
––are being or have been treated with long-acting depot injections of antipsychotics.

––suffer from bone marrow disease or have ever suffered from bone marrow disease.
––suffer from uncontrolled epilepsy (seizures or fits).
––have an acute mental illness caused by alcohol or drugs (e.g. narcotics).
––suffer from reduced consciousness and severe drowsiness.
––suffer from circulatory collapse which may occur as a result of severe shock.
––suffer from any severe kidney disease.
––suffer from myocarditis (an inflammation of the heart muscle).
––suffer from any other severe heart disease.
––have symptoms of active liver disease such as jaundice (yellow colouring of the skin and eyes,
feeling sick and loss of appetite).
––suffer from any other severe liver disease.
––suffer from paralytic ileus (your bowel does not work properly and you have severe constipation).
––use any medicine that stops your bone marrow from working properly.
––use any medicine that reduces the number of white cells in your blood.
If any of the above applies to you, tell your doctor and do not take Clozaril.
Clozaril must not be given to anyone who is unconscious or in a coma.
Warnings and Precautions
The safety measures mentioned in this section are very important. You must comply with them to
minimise the risk of serious life-threatening side effects.
Before you start treatment with Clozaril, tell your doctor if you have or ever had:
–– blood clots or family history of blood clots, as medicines like these have been associated with
formation of blood clots.
–– glaucoma (increased pressure in the eye).
–– diabetes. Elevated (sometimes considerably) blood sugar levels, has occurred in patients with or
without diabetes mellitus in their medical history (see section 4).
–– prostate problems or difficulty in urinating.
–– any heart, kidney or liver disease.
–– chronic constipation or if you are taking medicines which cause constipation (such as
anticholinergics).
–– galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption.
–– controlled epilepsy.
–– large intestine diseases.
––abdominal surgery.
––a heart disease or family history of abnormal conduction in the heart called “prolongation of the
QT interval”.
–– a risk for having a stroke, for example if you have high blood pressure, cardiovascular problems or
blood vessel problems in the brain.
Tell your doctor immediately before taking the next Clozaril tablet if you:
––get signs of a cold, fever, flu-like symptoms, sore throat or any other infection. You will have to
have an urgent blood test to check if your symptoms are related to your medicine.

––have a sudden rapid increase in body temperature, rigid muscles which may lead to
unconsciousness (neuroleptic malignant syndrome) as you may be experiencing a serious side effect
which requires immediate treatment.
––have fast and irregular heart beat, even when you are at rest, palpitations, breathing problems,
chest pain or unexplained tiredness. Your doctor will need to check your heart and if necessary
refer you to a cardiologist immediately.
––experience nausea (feeling sick), vomiting (being sick) and/or loss of appetite. Your doctor will
need to check your liver.
––have severe constipation. Your doctor will have to treat this in order to avoid further
complications.
Medical check-ups and blood tests
Before you start taking Clozaril, your doctor will ask about your medical history and do a blood test
to ensure that your white blood cells count is normal. It is important to find this out, as your body
needs white blood cells to fight infections.
Make sure that you have regular blood tests before you start treatment, during treatment and
after you stop treatment with Clozaril.
–– Your doctor will tell you exactly when and where to have the tests. Clozaril may only be taken if
you have a normal blood count.
–– Clozaril can cause a serious decrease in the number of white cells in your blood (agranulocytosis).
Only regular blood tests can tell the doctor if you are at risk of developing agranulocytosis.
–– During the first 18 weeks of treatment, tests are needed once a week. Afterwards, tests are
needed at least once a month.
–– If there is a decrease in the number of white blood cells, you will have to stop Clozaril treatment
immediately. Your white blood cells should then return to normal.
–– You will need to have blood tests for another 4 weeks after the end of Clozaril treatment.
Your doctor will also do a physical examination before starting treatment. Your doctor may do an
electrocardiogram (ECG) to check your heart, but only if this is necessary for you, or if you have any
special concerns.
If you have a liver disorder you will have regular liver function tests as long as you continue to take
Clozaril. If you suffer from high levels of sugar in the blood (diabetes) your doctor may regularly
check your level of sugar in the blood.
Clozaril may cause alteration in blood lipids. Clozaril may cause weight gain. Your doctor may
monitor your weight and blood lipid level.
If Clozaril makes you feel light-headed, dizzy or faint, be careful when getting up from a sitting or
lying position.
If you have to undergo surgery or if for some reason you are unable to walk around for a long time,
discuss with your doctor the fact that you are taking Clozaril. You may be at risk of thrombosis (blood
clotting within a vein).
Children and adolescents under 16 years
If you are under 16 years of age you should not use Clozaril as there is not enough information on its
use in that age group.
Older people (aged 60 years and over)

Older people (aged 60 years and over) may be more likely to have the following side effects during
treatment with Clozaril: faintness or light-headedness after changing position, dizziness, fast heart
beat, difficulty in passing urine, and constipation.
Tell your doctor or pharmacist if you suffer from a condition called dementia.
Other medicines and Clozaril
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other
medicines. This includes medicines obtained without a prescription or herbal therapies. You might
need to take different amounts of your medicines or to take different medicines.
Do not take Clozaril together with medicines that stop the bone marrow from working properly
and/or decrease the number of blood cells produced by the body, such as:
–– carbamazepine, a medicine used in epilepsy.
–– certain antibiotics: chloramphenicol, sulphonamides such as co-trimoxazole.
–– certain painkillers: pyrazolone analgesics such as phenylbutazone.
–– penicillamine, a medicine used to treat rheumatic joint inflammation.
–– cytoxic agents, medicines used in chemotherapy.
–– long-acting depot injections of antipsychotic medicines.
These medicines increase your risk of developing agranulocytosis (lack of white blood cells).
Taking Clozaril at the same time as another medicine may affect how well Clozaril and/or the
other medicine works. Tell your doctor if you plan to take, if you are taking (even if the course of
treatment is about to end) or if you have recently had to stop taking any of the following
medicines:
–– medicines used to treat depression such as lithium, fluvoxamine, tricyclic antidepressants, MAO
inhibitors, citalopram, paroxetine, fluoxetine, and sertraline.
–– other antipsychotic medicines used to treat mental illnesses such as perazine.
–– benzodiazepines and other medicines used to treat anxiety or sleep disturbances.
–– narcotics and other medicines which can affect your breathing.
–– medicines used to control epilepsy such as phenytoin and valproic acid.
–– medicines used to treat high or low blood pressure such as adrenaline and noradrenaline.
–– warfarin, a medicine used to prevent blood clots.
–– antihistamines, medicines used for colds or allergies such as hay fever.
–– anticholinergic medicines, which are used to relieve stomach cramps, spasms and travel sickness.
–– medicines used to treat Parkinson’s disease.
–– digoxin, a medicine used to treat heart problems.
–– medicines used to treat a fast or irregular heart beat.
–– some medicines used to treat stomach ulcers, such as omeprazole or cimetidine.
–– some antibiotic medicines, such as erythromycin and rifampicin.
–– some medicines used to treat fungal infections (such as ketoconazole) or viral infections (such as
protease inhibitors, used to treat HIV infections).
–– atropine, a medicine which may be used in some eye drops or cough and cold preparations.
–– adrenaline, a medicine used in emergency situations.
–– hormonal contraceptives (birth-control tablets).

This list is not complete. Your doctor and pharmacist have more information on medicines to be
careful with or to avoid while taking Clozaril. They will also know if the medicines you are taking
belong to the listed groups. Speak to them.
Taking Clozaril with food and drink
Do not drink alcohol during treatment with Clozaril.
Tell your doctor if you smoke and how often you have drinks containing caffeine (coffee, tea, cola).
Sudden changes in your smoking habits or caffeine drinking habits can also change the effects of
Clozaril.
Pregnancy and breast-feeding
If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask
your doctor for advice before taking this medicine. Your doctor will discuss with you the benefits and
possible risks of using this medicine during pregnancy. Tell your doctor immediately if you become
pregnant during treatment with Clozaril.
The following symptoms may occur in newborn babies, of mothers that have used Clozaril in the last
trimester (last three months of their pregnancy): shaking, muscle stiffness and/or weakness,
sleepiness, agitation, breathing problems, and difficulty in feeding. If your baby develops any of
these symptoms you may need to contact your doctor.
Some women taking some medicines to treat mental illnesses have irregular or no periods. If you
have been affected in this way, your periods might return when your medicine is changed to Clozaril.
This means you should use effective contraception.
Do not breast-feed during treatment with Clozaril. Clozapine, the active substance of Clozaril, may
pass into your milk and affect your baby.
Driving and using machines
Clozaril might cause tiredness, drowsiness and seizures, especially at the beginning of treatment.
You should not drive or operate machines while you have these symptoms.
Clozaril contains lactose.
If you have been told by your doctor that you have an intolerance to some sugars, discuss this with
your doctor before taking Clozaril.
3. How to take Clozaril
In order to minimise the risk of low blood pressure, seizures and drowsiness it is necessary that your
doctor increases your dose gradually. Always take Clozaril tablets exactly as your doctor has told
you. Check with your doctor or pharmacist if you are not sure.
It is important that you do not change your dose or stop taking Clozaril without asking your doctor
first. Continue taking the tablets for as long as your doctor tells you. If you are 60 years or older,
your doctor may start you on a lower dose and increase it more gradually because you might be
more likely to develop some unwanted side effects (see section 2
“Before you take Clozaril”).
If the dose you are prescribed cannot be achieved with this strength tablet, other strengths of this
medicinal product are available to achieve the dose.
Treatment of schizophrenia

The usual starting dose is 12.5 mg (one half of a 25 mg tablet) once or twice on the first day followed
by 25 mg once or twice on the second day. Swallow the tablet with water. If tolerated well, your
doctor will then gradually increase the dose in steps of 25-50 mg over the next 2-3 weeks until a
dose up to 300 mg per day is reached. Thereafter, if necessary, the daily dose may be increased in
steps of 50 to 100 mg half-weekly or, preferably, at weekly intervals.
The effective daily dose is usually between 200 mg and 450 mg, divided into several single doses per
day. Some people might need more. A daily dose of up to 900 mg is allowed.
Increased side effects (in particular seizures) are possible at daily doses over 450 mg. Always take
the lowest effective dose for you. Most people take part of their dose in the morning and part in the
evening. Your doctor will tell you exactly how to divide your daily dose. If your daily dose is only 200
mg, then you can take this as a single dose in the evening. Once you have been taking Clozaril with
successful results for some time, your doctor may try you on a lower dose. You will need to take
Clozaril for at least 6 months.
Treatment of severe thought disturbances in patients with Parkinson’s disease
The usual starting dose is 12.5 mg (one half of a 25 mg tablet) in the evening. Swallow the tablet
with water. Your doctor will then gradually increase the dose in steps of 12.5 mg, not faster than two
steps a week, up to a maximum dose of 50 mg by the end of the second week. Increases in the
dosage should be stopped or postponed if you feel faint,
light-headed or confused. In order to avoid such symptoms your blood pressure will be measured
during the first weeks of treatment.
The effective daily dose is usually between 25 mg and 37.5 mg, taken as one dose in the evening.
Doses of 50 mg per day should only be exceeded in exceptional cases. The maximum daily dose is
100 mg. Always take the lowest effective dose for you.
If you take more Clozaril than you should
If you think that you may have taken too many tablets, or if anyone else takes any of your tablets,
contact a doctor immediately or call for emergency medical help.
The symptoms of overdose are:
Drowsiness, tiredness, lack of energy, unconsciousness, coma, confusion, hallucinations, agitation,
incoherent speech, stiff limbs, trembling hands, seizures (fits), increased production of saliva,
widening of the black part of the eye, blurred vision, low blood pressure, collapse, fast or irregular
heart beat, shallow or difficult breathing.
If you forget to take Clozaril
If you forget to take a dose, take it as soon as you remember. If it is almost time for your next dose,
leave out the forgotten tablets and take the next dose at the right time. Do not take a double dose
to make up for a forgotten dose. Contact your doctor as soon as possible if you have not taken any
Clozaril for more than 48 hours.
If you stop taking Clozaril
Do not stop taking Clozaril without asking your doctor, because you might get withdrawal reactions.
These reactions include sweating, headache, nausea (feeling sick), vomiting (being sick) and
diarrhoea. If you have any of the above signs, tell your doctor straight away. These signs may be
followed by more serious side effects unless you are treated immediately. Your original symptoms
might come back. A gradual reduction in dose in steps of 12.5 mg over one to two weeks is
recommended, if you have to stop treatment. Your doctor will advise you on how to reduce your

daily dose. If you have to stop Clozaril treatment suddenly, you will have to be checked by your
doctor.
If your doctor decides to re-start the treatment with Clozaril and your last dose of Clozaril was over
two days ago, this will be with the starting dose of 12.5 mg.
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
4. Possible side effects
Like all medicines, Clozaril can cause side effects, although not everybody gets them.
Some side effects can be serious and need immediate medical attention:
Tell your doctor immediately before taking the next Clozaril tablet if you experience any of the
following:
Very common (affects more than 1 in 10 people):
––severe constipation. Your doctor will have to treat this in order to avoid further complications.
–– fast heart beat
Common (affects up to 1 in 10 people):
––signs of a cold, fever, flu-like symptoms, sore throat or any other infection. You will have to have
an urgent blood test to check if your symptoms are related to your medicine.
––seizures.
–– sudden fainting or sudden loss of consciousness with muscle weakness (syncope).
Uncommon (affects up to 1 in 100 people):
–– if you have a sudden rapid increase in body temperature, rigid muscles which may lead to
unconsciousness (neuroleptic malignant syndrome) as you may be experiencing a serious side effect
which requires immediate treatment.
Rare (affects up to 1 in 1,000 people):
––signs of a respiratory tract infection or pneumonia such as fever, coughing, difficulty breathing,
wheezing.
–– severe, burning, upper abdominal pain, extending to the back accompanied by nausea and
vomiting due to inflammation of the pancreas.
–– fainting and muscle weakness due to a significant drop in blood pressure (Circulatory collapse).
–– difficulty in swallowing (which may cause inhalation of food).
––nausea (feeling sick), vomiting (being sick) and/or loss of appetite. Your doctor will need to check
your liver.
Rare (affects up to 1 in 1,000 people) or very rare (affects up to 1 in 10,000 people):
––fast and irregular heart beat, even when you are at rest, palpitations, breathing problems, chest
pain or unexplained tiredness. Your doctor will need to check your heart and if necessary refer you
to a cardiologist immediately.
Very rare (affects up to 1 in 10,000 people):
–– persistent painful erection of the penis, if you are a man. This is called priapism. If you have an
erection which lasts more than 4 hours immediate medical treatment may be needed in order to
avoid further complications.

–– spontaneous bleeding or bruising, which might be signs of a decrease in numbers of blood
platelets.
–– symptoms due to uncontrolled blood sugar (such as nausea or vomiting, abdominal pain,
excessive thirst, excessive urination, disorientation or confusion.
–– abdominal pain, cramping, swollen abdomen, vomiting, constipation and failure to pass gas which
may be signs and symptoms of bowel obstruction.
–– loss of appetite, swollen abdomen, abdominal pain, yellowing of the skin, severe weakness and
malaise. These symptoms may be signs that you are starting to develop a liver disorder that may
advancement fulminant liver necrosis.
–– nausea, vomiting, fatigue, weight loss which may be symptoms of inflammation of the kidney.
Unknown (frequency cannot be estimated from the available data)
––crushing chest pain, sensation of chest tightness, pressure or squeezing (chest pain may radiate to
the left arm, jaw, neck and upper abdomen), shortness of breath, sweating, weakness, light
headedness, nausea, vomiting and palpitations (symptoms of heart attack). You should seek
emergency medical treatment immediately.
––chest pressure, heaviness, tightness, squeezing, burning or choking sensation (signs of insufficient
blood flow and oxygen to the heart muscle). Your doctor will need to check your heart.
- intermittent “thumping”, “pounding”or “fluttering” sensation in the chest
(palpitations).
- rapid and irregular heartbeats (atrial fibrillation). There may be occasional heart
palpitations, fainting, shortness of breath, or chest discomfort.
- symptoms of low blood pressure such as light-headedness, dizziness, fainting,
blurred vision, unusual fatigue, cold and clammy skin or nausea.
––signs of blood clots in the veins especially in the legs (symptoms include swelling, pain and
redness in the leg), which may travel through blood vessels to the lungs causing chest pain and
difficulty in breathing.
- proven or strongly suspected infection along with fever or low body
temperature, abnormally rapid breathing, rapid heart rate, change in responsiveness and
awareness, drop in blood pressure (sepsis).
––profuse sweating, headache, nausea, vomiting and diarrhoea (symptoms of cholinergic
syndrome).
––severely decreased urine output (sign of kidney failure).
––an allergic reaction (swelling mainly of the face, mouth and throat, as well as, the tongue, which
may be itchy or painful).
–– loss of appetite, swollen abdomen, abdominal pain, yellowing of the skin, severe
weakness and malaise. This may indicate possible liver disorders that involve replacement of normal
liver tissue with scar tissue leading to loss of liver function, including those liver events leading to
lifethreatening consequences such as liver failure (which may lead to death), liver injury (injury of
liver cells, bile duct in the liver, or both) and liver transplant.
If any of the above apply to you, please tell your doctor immediately before taking the next Clozaril
tablet.
Other side effects:
Very common (affects more than 1 in 10 people):

Drowsiness, dizziness, increased production of saliva.
Common (affects up to 1 in 10 people):
High level of white blood cells (leukocytosis), high level of a specific type of white blood cell
(eosinophilia), weight gain, blurred vision, headache, trembling, stiffness, restlessness, convulsions,
jerks, abnormal movements, inability to initiate movement, inability to remain motionless, changes
in ECG heart machine, high blood pressure, faintness or light-headedness after changing position,
nausea (feeling sick), vomiting (being sick), loss of appetite, dry mouth, minor abnormalities in liver
function tests, loss of bladder control, difficulty in passing urine,
tiredness, fever, increased sweating, raised body temperature, speech disorders (e.g. slurred
speech).
Uncommon (affects up to 1 in 100 people):
Lack of white blood cells (agranulocytosis), speech disorders (e.g. stuttering).
Rare (affects up to 1 in 1,000 people):
Low level of red blood cells (anaemia), restlessness, agitation, confusion, delirium, irregular heart
beat, inflammation of the heart muscle (myocarditis) or the membrane surrounding the heart
muscle (pericarditis), fluid collection around the heart (pericardial effusion), high level of sugar in the
blood, diabetes mellitus, blood clot in the lungs (thromboembolism), inflammation of the liver
(hepatitis), liver disease causing yellowing of the skin/dark urine/itching, raised levels of an enzyme
called creatinine phosphokinase in the blood.
Very rare (affects up to 1 in 10,000 people):
Increase in numbers of blood platelets with possible clotting in the blood vessels, uncontrollable
movements of mouth/tongue and limbs, obsessive thoughts and compulsive repetitive behaviours
(obsessive compulsive symptoms), skin reactions, swelling in front of the ear (enlargement of saliva
glands), difficulty in breathing, very high levels of triglycerides or cholesterol in the blood, disorder of
the heart muscle (cardiomyopathy), stopped heart beat (cardiac arrest), sudden unexplained death.
Unknown (frequency cannot be estimated from the available data)
Changes in brain waves machine (electroencephalogram/EEG), diarrhoea, stomach discomfort,
heartburn, stomach discomfort after a meal, muscle weakness, muscle spasms, muscle pain, stuffy
nose, nocturnal bedwetting, sudden, uncontrollable increase in blood pressure
(pseudophaeochromocytoma), uncontrolled bending of the body to one side (pleurothotonus),
ejaculatory disorder if you are a male, in which semen enters the bladder instead of ejaculating
through the penis (dry orgasm or retrograde ejaculation), rash, purplish-red spots, fever or itching
due to inflammation of blood vessel, inflammation of the colon resulting in diarrhoea, abdominal
pain, fever, change in skin colour, “butterfly” facial rash, joint pain, muscle pain, fever and fatigue
(lupus erythematous).
In elderly people with dementia, a small increase in the number of people dying has been reported
for patients taking antipsychotics compared with those not taking antipsychotics.
Reporting of side effects
If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects
not listed in this leaflet. You can also report side effects directly (see below). By reporting side
effects, you can help provide more information on the safety of this medicine.

United
Kingdom

Yellow Card Scheme
Website: www.mhra.gov.uk/yellowcard

5. How to store Clozaril
–– Keep this medicine out of the sight and reach of children.
–– Do not use Clozaril after the expiry date which is stated on the blister/bottle and the carton. The
expiry date refers to the last day of that month.
–– This medicinal product does not require any special storage conditions.
–– Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how
to throw away medicines you no longer use. These measures will help protect the environment.
6. Contents of the pack and other information
What Clozaril contains
–– The active substance is clozapine. Each tablet contains 25 mg or 100 mg clozapine.
–– The other ingredients are magnesium stearate, anhydrous colloidal silica, povidone K30, talc,
maize starch, lactose monohydrate.
What Clozaril looks like and contents of the pack
Clozaril tablets are available in PVC/PVDC/Aluminium or PVC/PE/PVDC/Aluminium blister packs
containing 7, 14, 20, 28, 30, 40, 50, 60, 84, 98, 100, 500 (10x50) or 5000 (100x50) tablets, and in
amber glass bottles (class III) containing 100 or 500 tablets.
Not all pack sizes may be marketed.
Marketing Authorisation Holder and Manufacturer
Marketing Authorisation Holder:
Mylan Products Ltd.
20 Station Close,
Potters Bar, Herts,
EN6 1TL
Manufacturer:
Mylan Hungary Kft
Mylan utca 1
Komárom, 2900
Hungary
Date of revision: 11/2016

+ Expand Transcript

Further information

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

Hide