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(prochlorperazine maleate)
This product will be referred to as Stemetil Tablets throughout
this leaflet.
Read all of this leaflet carefully before you start taking this
 Keep this leaflet. You may need to read it again
 If you have any further questions, ask your doctor or
 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
In this leaflet:
1. What Stemetil Tablets are and what they are used for
2. Before you take Stemetil Tablets
3. How to take Stemetil Tablets
4. Possible side effects
5. How to store Stemetil Tablets
6. Further information

What Stemetil Tablets are and what they are used for

Stemetil Tablets contain a medicine called prochlorperazine
maleate. This belongs to a group of medicines called
‘phenothiazene antipsychotics’. It works by blocking the effects of a
chemical in the brain.
Stemetil Tablets can be used to:
 Treat balance problems or dizziness (vertigo). This includes
problems of the inner ear such as ‘Meniere’s Syndrome’ or
 Stop you feeling sick (nausea) or being sick (vomiting). This
can be from any cause including migraines
 Treat schizophrenia
 Treat over-active behaviour or thoughts (mania)
 Treat anxiety in the short-term, when used in addition to other

Before you take Stemetil Tablets

Do not take this medicine and tell your doctor if:
Χ You are allergic (hypersensitive) to prochlorperazine maleate or
any of the other ingredients of Stemetil Tablets (listed in
Section 6 below)
Signs of an allergic reaction include: a rash, swallowing or
breathing problems, swelling of your lips, face, throat or tongue
Take special care with Stemetil Tablets
Check with your doctor or pharmacist before taking your
medicine if:
You are allergic to phenothiazine medicines such as
You have heart problems or a family history of heart problems
You have ever had a stroke
You have liver or kidney problems
You have thyroid problems
You have an enlarged prostate gland. This means you may
have problems when passing water (urine)
You or someone else in your family has a history of blood clots,
as medicines like these have been associated with formation of
blood clots
You have Parkinson’s disease
You have dementia
You have epilepsy or have ever had fits (seizures)
You have depression
You have a tumour on your adrenal gland called
You have a type of muscle weakness called ‘myasthenia
You have or have ever had glaucoma (signs include painful
eyes with blurred vision)
You have or have ever had a low number of white blood cells
(agranulocytosis). This would lead you to get infections more
easily than usual
You have low blood levels of potassium, calcium and
magnesium. Your doctor may perform blood tests to check on
You are not eating properly or are very under-weight
You have a history of alcohol problems
You are elderly (65 years of age or older)
The person is a child. This is because children may develop
unusual face and body movements (dystonic reactions)
You are diabetic or have high levels of sugar in your blood
(hyperglycaemia). Your doctor may want to monitor you more
If you are not sure if any of the above apply to you, talk to your
doctor or pharmacist before taking Stemetil Tablets.
Taking other medicines
Please tell your doctor or pharmacist if you are taking or have
recently taken any other medicines. This includes medicines you
buy without a prescription, including herbal medicines. This is
because Stemetil Tablets can affect the way some other medicines
work. Also some medicines can affect the way Stemetil Tablets
In particular, tell your doctor if you are taking any of the following:
 Medicines to help you sleep (sedatives, barbiturates)
 Other medicines used to calm emotional and mental conditions
 Medicines used for depression
 Medicines used for Parkinson’s disease such as levodopa
 Medicines for fits (epilepsy) such as carbamazepine
 Medicines used to control your heartbeat such as amiodarone,
disopyramide, propanolol or quinidine

 Medicines for high blood pressure such as doxazosin,
terazosin, guanethidine or clonidine
 Medicines used for diabetes
 Medicines used for cancer (cytotoxics)
 Medicines used for infections (antibiotics)
 Medicines for indigestion and heartburn (antacids)
 Anticholinergic medicines - includes some medicines used for
irritable bowel syndrome, asthma or incontinence
 Amphetamines - used for Attention Deficit Hyperactivity
Disorder (ADHD)
 Adrenaline - used for life threatening allergic reactions
 Desferrioxamine - used when you have too much iron in your
 Lithium - used for some types of mental illness
Taking Stemetil Tablets with food and drink
Do not drink alcohol while you are taking Stemetil Tablets. This is
because alcohol can add to the effects of Stemetil Tablets and can
cause serious breathing difficulties.
Pregnancy and breast-feeding
Do not take Stemetil Tablets if:
 You are pregnant, might become pregnant or think you might
be pregnant
 You are breast-feeding or planning to breast-feed
The following symptoms may occur in newborn babies, of mothers
that have used Stemetil Tablets 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.
Ask your doctor or pharmacist for advice before taking any
medicine if you are pregnant or breast-feeding.
Driving and using machines
You may feel sleepy after taking this medicine. If this happens, do
not drive or use any tools or machines.
Important information about some of the ingredients of
Stemetil Tablets
 Lactose. This medicine contains lactose, a type of sugar. If you
have been told by your doctor that you can not tolerate some
sugars, talk to your doctor before taking Stemetil Tablets

How to take Stemetil Tablets

Always take Stemetil Tablets exactly as your doctor has told you.
You should check with your doctor or pharmacist if you are not
Taking this medicine
 Take this medicine by mouth
 Do not give to children under 1 year of age or who weigh less
than 10 kg
 You should not let the tablets touch your skin for very long, as
you may get skin redness, swelling and itching (contact skin
 If you feel the effect of your medicine is too weak or too strong,
do not change the dose yourself, but ask your doctor
How much to take
Treatment of balance problems or
dizziness (Vertigo):
 The usual dose is 5 mg three times each day
 This may be increased to a total daily dose of 30 mg each
 After several weeks treatment, your doctor may decide to
gradually lower your daily dose to 5 to 10 mg each day
Stopping you feeling sick or being sick:
 The usual dose is 5 or 10 mg
 This may be taken two or three times each day
Treatment of feeling sick or being sick:
 To begin with you will usually take 20 mg
 This may be followed by 10 mg two hours later
Treatment of schizophrenia and overactive behaviour or
thoughts (mania):
 The starting dose is usually 12.5 mg twice each day for
seven days
 Your doctor may increase your dose up to a total daily dose
of 75 to 100 mg each day
 After several weeks of treatment, your doctor may then
lower your dose to a total daily dose of 25 to 50 mg each
Short-term treatment of anxiety:
 The starting dose will be 15 to 20 mg each day in divided
 Your doctor may then increase your dose to a total daily
dose of 40 mg each day
 Your doctor may prescribe a lower dose
 You should be careful during very hot or very cold weather
to make sure that you do not get too hot or too cold.
Children (over 1 year of age and weighing more than 10
Stopping your child feeling sick or being sick:
 Your doctor will decide the dose according your child’s
 A dose of 0.25 mg for each kilogram of your child’s
weight is usually given
 This dose may be given two or three times a day

If you take more Stemetil Tablets than you should
If you take more Stemetil Tablets than you should, tell a doctor or
go to a hospital casualty department straight away. Take the
medicine pack with you. This is so the doctor knows what you have
taken. Taking too much Stemetil Tablets may cause symptoms
such as feeling sleepy or dizzy, increased or rapid heartbeat,
feeling very cold and confused, writhing movements, feeling
restless, stiffness or shaking. You may lose consciousness.
If you forget to take Stemetil Tablets
If you forget a dose, take it as soon as you remember it. However,
if it is nearly time for the next dose, skip the missed dose. Do not
take a double dose to make up for a forgotten dose.
If you stop taking Stemetil Tablets
Keep taking Stemetil Tablets until your doctor tells you to stop. Do
not stop taking Stemetil Tablets just because you feel better.
If you stop, your illness may come back and you may have other
effects such as feeling or being sick or difficulty sleeping. Your
doctor will gradually stop your medicine to prevent these effects
Exposure to sunlight
Stemetil Tablets can cause your skin to be more sensitive to
sunlight. You should avoid exposure to direct sunlight while taking
this medicine.
Your doctor may do regular tests while you are taking this
medicine. These might include blood tests and an ECG to check
your heart is working properly.
If you have any further questions on the use of this product, ask
your doctor or pharmacist.

Possible side effects

Like all medicines, Stemetil Tablets can cause side effects,
although not everybody gets them.
Stop taking Stemetil Tablets and see a doctor or go to a
hospital straight away if:
 You have an allergic reaction. The signs may include: a rash,
swallowing or breathing problems, swelling of your lips, face,
throat or tongue
 You have an unusually pale complexion, sweating, high
temperature, fast heartbeat, stiff muscles, fast breathing and
feel confused, drowsy or agitated. These could be signs of a
serious side effect called ‘neuroleptic malignant syndrome’
 You have frequent infections such as fever, sore throat or
mouth ulcers. These could be signs of a blood problem called
 You may get infections more easily than usual. This could be
because of a blood disorder (agranulocytosis)
 You have yellowing of your skin or eyes (jaundice). These could
be signs of liver problems
 You have very fast, uneven or forceful heartbeats (palpitations)
and experience breathing problems such as wheezing,
shortness of breath, tightness in the chest and chest pain
 You have 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.
If you notice any of these symptoms seek medical advice
 You have rigid or stiff muscles, trembling or shaking, unusual
eye movements (including rolling of the eyes), difficulty moving,
or loss of muscle power
Tell your doctor as soon as possible if you have any of the
following side effects:
 Breathing problems
 Changes in your skin or eye colour after taking Stemetil Tablets
for a long period of time
 Problems with your eyesight after taking Stemetil Tablets for a
long period of time
 Feeling dizzy, lightheaded or faint when you stand or sit up
quickly (due to low blood pressure)
 Passing large amounts of urine, excessive thirst and having a
dry mouth or skin. You may be more likely to get infections,
such as thrush. This could be due to too much sugar in your
blood (hyperglycaemia)
Tell your doctor or pharmacist if any of the following side
effects get serious or lasts longer than a few days
 Abnormal production of breast milk in men and women
 Breast enlargement in men
 Loss of menstrual periods
 Difficulty in getting or maintaining an erection (impotence)
 Difficulty sleeping (insomnia)
 Feeling restless or agitated
 Dry mouth
 Your skin being more sensitive to the sun than usual
 Stuffy nose
 Skin rashes
 Skin redness, swelling and itching from touching the medicine
In elderly people with dementia, a small increase in the number of
deaths has been reported for patients taking antipsychotics
compared with those not receiving antipsychotics.
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.


How to store Stemetil Tablets

 Store below 25°C in original container and protect from light.
 You must not take these tablets after the expiry date. This is
given on the carton or on the blister/bottle. In both places it is
given as ‘Exp’ followed by the month or year. The tablets
should not be used after the end of that month. If you are not
sure when this is, check with your doctor or pharmacist.
 Your tablets should be stored in the pack in which you were
given them, and away from light.
 Do not keep the tablets if your doctor decides to stop treatment.
Return them to your pharmacist who will arrange for their safe

Further information

What Stemetil Tablets contain
 Each tablet contains 5mg of the active ingredient
prochlorperazine maleate.
 Each tablet also contains the following ingredients: lactose,
maize starch, magnesium stearate and colloidal silicon dioxide.
What Stemetil Tablets look like and contents of the pack
Your tablets are off white to pale cream, marked on one side with
“Stemetil 5”. They are available in blister packs of 100 tablets.
This product is manufactured by:
Famar Health Care Services Madrid S.A.U., Alcorcon, Spain.
It is procured from within the EU and repackaged by the Parallel
Import Product Licence holder: G Pharma Ltd, Salford M50 2PU.
PL NO: 16369/0356
Stemetil 5 mg Tablets


Stemetil is a registered trademark of May & Baker Ltd.


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Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.