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Valproate de sodium pour l'épilepsie

Epilim, Episenta

Clinical Author's Note (Michael Stewart) 03/04/2018: valproate medicines must not be taken during pregnancy unless there is no suitable alternative. MHRA and the European Medicines Agency have announced strengthened measures to further reduce the risk of exposure to valproate drugs during pregnancy. Any woman or girl of child-bearing potential who needs a valproate medicine must be enrolled on a pregnancy prevention programme. This will involve counselling on potential risks as well as ongoing pregnancy testing during treatment. Click on the link above for more information and speak with your doctor if you have any concerns.

Read the information leaflet from inside your pack.

Take sodium valproate regularly every day. Do not suddenly stop taking it as this can cause your symptoms to return.

If you develop tummy (abdominal) pain, sickness, yellowing of your skin or of the whites of your eyes (jaundice) or any unexplained bruising or bleeding, tell your doctor straightaway.

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About sodium valproate

Type de médicament

Un médicament antiépileptique

Utilisé pour

Epilepsie

Également appelé

Dyzantil®; Epilim®; Episenta®; Epival®; Convulex® (as valproic acid)

Disponible en

Tablets, crushable tablets, oral liquid medicine, modified-release tablets, modified-release capsules, and sachets

Sodium valproate is prescribed to treat epileptic disease and seizures. It can be taken both by adults and by children.

A seizure is a short episode of symptoms which is caused by a burst of abnormal electrical activity in the brain. Sodium valproate works by reducing these abnormal electrical activities.

There is also a medicine with a similar name but which is used to treat a different condition. See the medicine leaflet called Valproate semisodium for bipolar disorder for more information about this.

Before taking sodium valproate

Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking sodium valproate it is important that your doctor knows:

  • Si vous êtes enceinte, si vous essayez d'avoir un enfant ou si vous allaitez.

  • If you or a close member of your family have liver problems.

  • Si vous avez des problèmes de fonctionnement des reins.

  • If you have an inflammatory condition called systemic lupus erythematosus (also called lupus or SLE).

  • Si vous êtes atteint d'une maladie sanguine héréditaire rare appelée porphyrie.

  • If you have been told you have a mitochondrial disorder or a urea cycle disorder.

  • Si vous prenez d'autres médicaments. Cela inclut tous les médicaments que vous prenez et qui sont disponibles sans ordonnance, ainsi que les médicaments à base de plantes et les médicaments complémentaires.

  • Si vous avez déjà eu une réaction allergique à un médicament.

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How to take sodium valproate

  • Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about sodium valproate and it will provide you with a full list of the side-effects which you may experience from taking it.

  • Take sodium valproate exactly as your doctor tells you to. It is usual to start treatment on a low dose, and then for the dose to be increased gradually to a regular maintenance dose. Most people take one or two doses daily. Doses for children are tailored to their age and weight.

  • Read the printed information with your supply for more details about how you should take your doses. For example, many brands of sodium valproate must be taken with or just after food. Some brands of tablets are crushable to make them easier to swallow. Others must be swallowed whole without crushing or chewing. The label on the pack and the printed information leaflet from inside will provide this sort of information for you. Alternatively, you can ask your pharmacist to advise you.

  • If you have been prescribed sachets (granules), you can swallow the granules by pouring them into your mouth and swallowing them with a drink of water. If you prefer, you can sprinkle the granules on to some soft food (yoghurt or ice cream, for example) or into a cool drink. Do not chew the granules.

  • Try to get into a habit of taking sodium valproate at the same time(s) each day. This will help you avoid missing doses.

  • If you do forget to take a dose, take it as soon as you remember unless it is nearly time for your next dose, in which case leave out the missed dose. Do not take two doses together to make up for a forgotten dose.

Tirer le meilleur parti de votre traitement

  • Lorsque vous commencez un nouveau traitement contre l'épilepsie, il se peut que le nombre ou le type de crises change. Votre médecin vous conseillera à ce sujet.

  • Try to keep your regular appointments with your doctor. This is so your doctor can check on your progress. You will need to have blood tests before you start the medicine and while you are taking it.

  • There are several brands of sodium valproate available and your treatment could be affected by switching between brands made by different manufacturers. Each time you collect a new supply from your pharmacy, check to see if it looks the same as you have had before. If it is different, please discuss this with your pharmacist who will advise you.

  • You need to take sodium valproate every day. Stopping treatment suddenly can cause problems. If it becomes necessary for the treatment to stop, your doctor will want you to reduce your dose over a few days.

  • Sodium valproate can harm an unborn child so you must avoid getting pregnant while you are taking sodium valproate. Make sure you have discussed with your doctor which types of contraception are suitable for you and your partner. If you are a woman and want to have a family, discuss this with your doctor so that you can be given advice from a specialist about alternative treatment before you become pregnant.

  • Les personnes épileptiques doivent cesser de conduire. Votre médecin vous indiquera quand vous pourrez recommencer à conduire. Ce sera généralement après une année sans crises.

  • Pendant que vous êtes traité pour une épilepsie, il existe un faible risque que vous développiez des changements d'humeur, des pensées angoissantes et des envies de suicide. Si cela se produit, vous devez en parler immédiatement à votre médecin.

  • If you buy any medicines, always check with a pharmacist that they are suitable to take with your other medicines. Medicines which contain aspirin (such as some cold or flu remedies and painkillers) can interfere with sodium valproate.

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Can sodium valproate cause problems?

Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones associated with sodium valproate. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.

Très fréquente

sodium valproate side-effects (these affect more than 1 in 10 people)

Que puis-je faire si je suis confronté à cette situation ?

Sensation de malaise (nausée), douleur à l'estomac

S'en tenir à des aliments simples - éviter les repas riches ou épicés

Feeling shaky

En cas de troubles, parlez-en à votre médecin

Communs

sodium valproate side-effects (these affect fewer than 1 in 10 people)

Que puis-je faire si je suis confronté à cette situation ?

Perte de cheveux

This is usually temporary and the hair regrows (although it may be curlier than before)

Maux de tête

Buvez beaucoup d'eau et demandez à votre pharmacien de vous recommander un analgésique adapté. Si les maux de tête persistent, prévenez votre médecin

Diarrhée

Boire beaucoup d'eau pour remplacer les liquides perdus

Sentiment de somnolence

Ne pas conduire et ne pas utiliser d'outils ou de machines. Ne pas boire d'alcool

Augmentation du poids

Try to eat a well-balanced diet and take regular exercise

Uncontrolled muscle movements, lack of concentration, allergic reactions, problems with hearing

Let your doctor know about any of these

Problems with your liver, changes to some blood test results

Your doctor will routinely check for these

Important: sodium valproate has been associated with a number of serious unwanted effects affecting the blood, pancreas and liver. Although these occur less commonly than some of the side-effects listed above, you must let your doctor know straightaway if you notice any of the following:

  • An unexplained cough or sore throat, or any unusual bleeding or bruising.

  • Extreme tiredness, tummy (abdominal) pain, sickness (nausea and vomiting), dark urine or yellowing of your skin or of the whites of your eyes (jaundice).

How to store sodium valproate

  • Conservez tous les médicaments hors de la portée et de la vue des enfants.

  • Conserver dans un endroit frais et sec, à l'abri de la chaleur et de la lumière directes.

Informations importantes sur tous les médicaments

Informations importantes sur tous les médicaments

Ne dépassez jamais la dose prescrite. Si vous pensez que vous ou quelqu'un d'autre avez pris une dose excessive de ce médicament, rendez-vous au service des accidents et des urgences de votre hôpital local. Emportez la boîte avec vous, même si elle est vide.

Ce médicament est pour vous. Ne le donnez jamais à d'autres personnes, même si leur état semble être le même que le vôtre.

Si vous devez subir une opération ou un traitement dentaire, indiquez à la personne chargée du traitement les médicaments que vous prenez.

Ne gardez pas les médicaments périmés ou dont vous ne voulez plus. Apportez-les à votre pharmacie locale qui les éliminera pour vous.

Si vous avez des questions sur ce médicament, demandez à votre pharmacien.

Signaler les effets secondaires d'un médicament ou d'un vaccin

Si vous ressentez des effets secondaires, vous pouvez les signaler en ligne sur le site web de la carte jaune.

Autres lectures et références

Historique de l'article

Les informations contenues dans cette page sont rédigées et évaluées par des cliniciens qualifiés.

  • Date de la prochaine révision : 4 octobre 2026
  • 5 Oct 2023 | Dernière version

    Dernière mise à jour par

    Michael Stewart, MRPharmS

    Examiné par des pairs

    Sid Dajani
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