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CONVULEX CAPSULES 500MG
Active substance(s): VALPROIC ACID
Convulex® 150 mg capsules
Convulex® 300 mg capsules
Convulex® 500 mg capsules
Active substance: Valproic acid
▼This medicine is subject to additional monitoring. This will allow quick identification of new safety
information. You can help by reporting any side effects you may get. See the end of section 4 for
how to report side effects.
Valproate can cause birth defects and problems with early development of the child if it is taken
during pregnancy. If you are a female of childbearing age you should use an effective method of
contraception throughout your treatment.
Your doctor will discuss this with you but you should also follow the advice in section 2 of this leaflet.
Tell your doctor at once if you become pregnant or think you might be pregnant.
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 symptoms 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.
In this leaflet:
What Convulex is and what it is used for
What you need to know before you take Convulex
How to take Convulex
Possible side effects
How to store Convulex
Contents of the pack and other information
1. What Convulex is and what it is used for
Convulex is an antiepileptic, i.e. a medicine which is used to treat epilepsy (fits). Its active ingredient
is valproic acid.
2. What you need to know before you take Convulex
Do not take Convulex
if you are allergic (hypersensitive) to valproic acid or any of the other ingredients of Convulex
(see 6 “Further information”).
if you have liver problems.
if you have a family history of liver problems.
if you suffer from porphyria (a rare metabolic condition).
If you have a genetic problem causing a mitochondrial disorder (e.g. Alpers-Huttenlocher
Warnings and precautions
Talk to your doctor or pharmacist before taking Convulex.
Take special care with Convulex
if you experience abdominal pain, nausea and/or vomiting: Contact your doctor
immediately, as these may be symptoms of pancreatitis (inflammation of the pancreas). The
risk of this potentially life-threatening condition is especially high in young children, in patients
receiving combination treatment and in those with severe liver function disorder.
Convulex may cause marked and progressive weight gain. This is a very common side effect.
Consult your doctor about appropriate strategies to minimize this risk.
Tell your doctor before starting Convulex
if you have lupus (an immune system condition affecting skin, bones and joints, lungs, kidneys).
if you are diabetic. Valproic acid may give an indication that ketones are present in the urine
when this is not the case.
if you have kidney problems. You may need a lower dose.
if you suffer from urea cycle enzymatic deficiency (a rare metabolic disorder).
If you know that there is a genetic problem causing a mitochondrial disorder in your family.
Talk to your doctor even if you no longer have these conditions, but have had them in the past.
Your doctor may advise blood tests before you start taking Convulex and during the first six
months of treatment.
A small number of people being treated with anti-epileptics such as valproic acid have had thoughts
of harming or killing themselves. If at any time you have these thoughts, immediately contact your
Other medicines and Convulex
Tell your doctor if you are taking, have recently taken or might take any other medicines.
If taken with some other medicines, the effects of Convulex or the effects of the other medicines
may be changed.
Please tell your doctor if you are taking any of the following:
salicylates, e.g. aspirin.
antidepressants including monoamine oxidase inhibitors.
anticoagulants, used to thin the blood (e.g. warfarin).
benzodiazepines, used as sleeping tablets and to treat anxiety.
other antiepileptics, e.g. phenytoin, carbamazepine, phenobarbital, lamotrigine, primidone,
cholestyramine, used to treat high blood lipid (fat) levels.
cimetidine, used to treat stomach ulcers.
antibiotics, e.g. erythromycin, carbapenem, imipenem, panipenem and meropenem.
medicines to prevent and treat malaria, e.g. mefloquine and chloroquine. They may increase the
likelihood of a fit. Before travelling to a high-risk malaria area, seek advice from your doctor or
pharmacist on the most appropriate prevention medicines.
zidovudine, used to treat HIV and AIDS.
temozolomide, used to treat cancer.
In particular, tell your doctor or nurse if you are taking any of the following medicines:
Carbapenem agents (antibiotic used to treat bacterial infections). The combination of valproic acid
and carbapenems should be avoided because it may decrease the effect of sodium valproate.
If you have to undergo any type of surgery, including dental procedures where anaesthesia is
required, tell the doctor that you are taking Convulex.
Convulex does not appear to influence the effect of oral contraceptives.
Convulex with food and drink
Convulex may be taken with food and drink.
The capsules are usually taken after meals.
Pregnancy, breast-feeding and fertility
Important advice for women
• Valproate can be harmful to unborn children when taken by a woman during pregnancy.
• Valproate carries a risk if taken during pregnancy. The higher the dose, the higher the risks but
all doses carry a risk.
• It can cause serious birth defects and can affect the way in which the child develops as it
grows. Birth defects which have been reported include spina bifida (where the bones of the
spine are not properly developed); facial and skull malformations; heart, kidney, urinary tract
and sexual organ malformations; limb defects.
• If you take valproate during pregnancy you have a higher risk than other women of having a
child with birth defects that require medical treatment. Because valproate has been used for
many years we know that in women who take valproate around 10 babies in every 100 will have
birth defects. This compares to 2-3 babies in ever 100 born to women who don’t have epilepsy.
• It is estimated that up to 30-40% of preschool children whose mothers took valproate during
pregnancy may have problems with early childhood development. Children affected can be
slow to walk and talk , intellectually less able than other children, and have difficulty with
language and memory.
• Autistic spectrum disorders are more often diagnosed in children exposed to valproate and
there is some evidence children may be more likely to develop symptoms of Attention Deficit
Hyperactivity Disorder (ADHD).
• If you are a woman capable of becoming pregnant your doctor should only prescribe valproate
for you if nothing else works for you.
• Before prescribing this medicine to you, your doctor will have explained what might happen to
your baby if you become pregnant whilst taking valproate. If you decide later you want to have a
child you should not stop taking your medicine until you have discussed this with your doctor
and agreed a plan for switching you onto another product if this is possible.
• Ask your doctor about taking folic acid when trying for a baby. Folic acid can lower the general
risk of spina bifida and early miscarriage that exists with all pregnancies. However, it is unlikely
that it will reduce the risk of birth defects associated with valproate use.
If this is the first time you have been prescribed valproate your doctor will have explained the risks
to an unborn child if you become pregnant. Once you are of childbearing age, you will need to make
sure you use an effective method of contraception throughout your treatment. Talk to your doctor or
family planning clinic if you need advice on contraception.
• Make sure you are using an effective method of contraception.
• Tell your doctor at once if you are pregnant or think you might be pregnant.
CONTINUING TREATMENT AND NOT TRYING FOR A BABY
If you are continuing treatment with valproate but you don’t plan to have a baby make sure you are
using an effective method of contraception. Talk to your doctor or family planning clinic if you need
advice on contraception.
• Make sure you are using an effective method of contraception
• Tell your doctor at once if you are pregnant or think you might be pregnant.
CONTINUING TREATMENT AND CONSIDERING TRYING FOR A BABY
If you are continuing treatment with valproate and you are now thinking of trying for a baby you must
not stop taking either your valproate or your contraceptive medicine until you have discussed this
with your prescriber. You should talk to your doctor well before you become pregnant so that you
can put several actions in place so that your pregnancy goes as smoothly as possible and any risks
to you and your unborn child are reduced as much as possible.
Your doctor may decide to change the dose of valproate or switch you to another medicine before
you start trying for a baby.
If you do become pregnant you will be monitored very closely both for the management of your
underlying condition and to check how your unborn child is developing.
Ask your doctor about taking folic acid when trying for a baby. Folic acid can lower the general risk
of spina bifida and early miscarriage that exists with all pregnancies. However, it is unlikely that it
will reduce the risk of birth defects associated with valproate use.
• Do not stop using your contraception before you have talked to your doctor and worked
together on a plan to ensure your epilepsy/bipolar disorder is controlled and the risks to your
baby are reduced.
• Tell your doctor at once when you know or think you might be pregnant.
UNPLANNED PREGNANCY WHILST CONTINUING TREATMENT
Babies born to mothers who have been on valproate are at serious risk of birth defects and
problems with development which can be seriously debilitating. If you are taking valproate and you
think you are pregnant or might be pregnant contact your doctor at once. Do not stop taking your
medicine until your doctor tells you to.
Ask your doctor about taking folic acid. Folic acid can lower the general risk of spina bifida and early
miscarriage that exists with all pregnancies. However, it is unlikely that it will reduce the risk of birth
defects associated with valproate use.
Tell your doctor at once if you know you are pregnant or think you might be pregnant.
Do not stop taking valproate unless your doctor tells you to.
Make sure you read the patient booklet and sign the Acknowledgement of Risk form which
should be given to you and discussed with you by your doctor or pharmacist.
Driving and using machines
When you first start taking Convulex, or if you are taking it with other medicines, you may notice
Do not drive or use any tools or machines until you know if you are affected by the intake of
3. How to take Convulex
Always take Convulex exactly as your doctor has told you. Check with your doctor if you are not
Convulex treatment must be started and supervised by a doctor specialised in the treatment of
epilepsy or bipolar disorders.
Swallow the capsules whole, after meals, with a drink of water, unless your doctor advises
differently. Do not crush or chew the capsules.
The usual dose of Convulex is between 1000 and 2000 mg per day but may be increased to 2500
mg per day. Usually, this quantity is evenly divided and taken in 2 separate doses, e.g. half in the
morning and half in the evening.
Use in children and adolescents
Children over 20 kg
The usual dose of Convulex is based on the child’s weight. The usual dose is between 20 and 30
mg for each kg of body weight but may be increased to 35 mg for each kg of body weight per day.
Usually, this quantity is evenly divided and taken in 2 separate doses, e.g. half in the morning and
half in the evening.
Children under 20 kg
The usual dose of Convulex is based on the child’s weight. The usual dose is 20 mg for each kg of
body weight. Usually, this quantity is evenly divided and taken in 2 separate doses, e.g. half in the
morning and half in the evening.
When Convulex is first commenced, you may be prescribed a lower dose. This is because some
patients need less Convulex than others to control their fits. Your doctor will increase the dosage
until your condition is controlled. As a result of this it is very important that you follow the instructions
your doctor has given you about how much to take. Blood tests may be needed.
If you have a kidney disease, your doctor may prescribe a lower dose.
If you are taking other medicines to control your epilepsy at the same time as Convulex, your
doctor may gradually reduce the dose of these antiepileptics while increasing the dose of Convulex
in small units per day, based on your body weight.
Make sure you keep your regular check up appointments with your doctor. They are very
important as your dosage may need to be changed.
If you take more Convulex than you should
An overdose of this medicine may be dangerous. If you think you have taken more Convulex than
you should, talk to a doctor or pharmacist, or go to the nearest hospital casualty department
If you forget to take Convulex
If you forget to take a dose at the right time, take it as soon as you remember, unless it is nearly
time for your next dose. Then go on as before. Do not take a double dose to make up for a forgotten
If you stop taking Convulex
If you wish to stop taking Convulex, talk to your doctor first.
Do not stop taking Convulex just because you feel better, as this may lead to an immediate relapse
and your condition may get worse.
If you have any further questions on the use of this product, ask your doctor or pharmacist.
4. Possible side effects
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Please note that the following list includes all reported side effects – even those that occur very
It is very important that you immediately contact your doctor if you develop any of the
following symptoms, because urgent medical measures may be necessary:
Certain changes in the blood, which may lead to an increased risk of weakness, bleeding or
bruising, and can make infections more likely.
Severe or persisting abdominal pain, nausea and/or vomiting (these may be symptoms of
severe liver damage or of an inflammation of the pancreas, which may take a life-threatening
Vomiting, disturbed coordination of movements and progressive clouding of consciousness
(these may be signs of increased ammonia levels in the blood).
Serious (sometimes life-threatening) skin reactions with blistering of the skin, mouth, eyes or
Tell your doctor or pharmacist, if you develop any of the following side effects:
Very common side effects (affecting more than 1 person in 10):
During treatment, increased appetite leading to weight gain, which may be marked in some
Common side effects (affecting less than 1 person in 10):
Drowsiness. This side effect is mostly seen when other antiepileptics are used at the same time;
more rarely it also occurs if Convulex only is taken.
Trembling, particularly at higher dosages, abnormal sensations (e.g. tickling or tingling
Nail and nail bed disorders
Uncommon side effects (affecting less than 1 person in 100):
Disturbed coordination of movements and dizziness, particularly at higher dosages
Confusion (occasionally followed by disturbed consciousness or associated with hallucinations
minor gastrointestinal irritation (e.g. nausea) at the beginning of treatment; this can usually be
overcome by taking the capsules with or after food (see under 3. “How to take Convulex”).
Excessive formation of saliva.
Oedema (swelling of the fingers, legs and toes).
Vasculitis (inflammation of the blood vessels), which may present as pain, reddening or itching
of the skin.
Rare side effects (affecting less than 1 person in 1,000):
Lethargy, temporary disturbance of brain functions, twitching of the eyes.
Impairment of hearing, usually temporary. However, it is not known if this occurs due to the
treatment with valproic acid.
Reversible Fanconi´s syndrome (a rare kidney disorder).
Skin changes, e.g. rash.
Changes in women’s periods and cysts on the ovaries; elevated testosterone levels in both
sexes (leading to e.g. increased growth of face or body hair).
Systemic lupus erythematosus (an allergic condition, which causes joint pain, skin rashes and
Porphyria (a rare metabolic disease which may be associated with red coloration of the urine,
abdominal spasms and pain as well as vomiting).
Very rare side effects (affecting less than 1 person in 10,000):
Temporary loss of consciousness, Parkinson-like symptoms such as reduced capacity of
movement, trembling, increased muscular tension, involuntary movements, reversible dementia
Acne and excessive growth of facial or body hair.
Increased breast growth in men.
The following side effects have also been reported with no frequency given:
Noises in one or both ears.
Vomiting, diarrhoea, lack of appetite, constipation.
Involuntary discharge of urine in children.
Temporary hair loss has been noted in some patients. Regrowth normally begins within six
months, although the hair may become curlier than before.
Temporary elevation of liver test values (which can be seen in blood tests) may occur at the
beginning of treatment.
An increase in alertness may occur. This is generally considered a positive effect, but
occasionally symptoms such as hyperactivity, aggression and inappropriate behaviour have
There have been reports of bone disorders including osteopenia and osteoporosis (thinning of
the bone) and fractures. Check with your doctor or pharmacist if you are on long-term
antiepileptic medication, have a history of osteoporosis, or take steroids.
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 via the national reporting system:
Yellow Card Scheme
By reporting side effects you can help provide more information on the safety of this medicine.
5. How to store Convulex
Keep out of the sight and reach of children.
Do not store above 25 °C.
Store in the original container in order to protect from light.
Do not use Convulex after the expiry date which is stated on the blister and on the carton after “use
before”. The expiry date refers to the last day of that month.
Do not throw away 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 Convulex contains
The active substance is valproic acid.
One Convulex capsule 150 contains 150 mg valproic acid.
One Convulex capsule 300 contains 300 mg valproic acid.
One Convulex capsule 500 contains 500 mg valproic acid.
The other ingredients are gelatine, glycerol 85%, dry substance of Karion 83, titanium dioxide (E
171), red ferric oxide (E 172), hydrochloric acid, methacrylic acid-ethylacrylate copolymer (1:1)dispersion 30%, triethyl citrate, macrogol 6000 and glycerol monostearate 44-55 Type II
What Convulex looks like and contents of the pack
Convulex capsules are oval, old-rose coloured soft-gelatine capsules in blister packs and are
supplied in cartons of 100.
Marketing Authorisation Holder and Manufacturer
G.L. Pharma GmbH
Leaflet revised December 2015.
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.