Sodium valproate for epilepsy
Epilim, Episenta
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSLast updated 5 Oct 2023
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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 programa de prevención del embarazo. Esto implicará asesoramiento sobre los riesgos potenciales, así como pruebas de embarazo continuas durante el tratamiento. Haga clic en el enlace de arriba para obtener más información y hable con su médico si tiene alguna inquietud.
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.
At a glance
Sodium valproate is a medicine used to treat epilepsy and seizures in adults and children.
It works by reducing abnormal electrical activity in the brain.
Read the patient information leaflet for specific instructions on taking your brand of medicine.
Do not stop taking sodium valproate suddenly, as this can cause problems.
If you are a woman of child-bearing age, you must use effective contraception.
Tell your doctor straightaway if you experience mood changes or distressing thoughts.
See a doctor immediately if you have an unexplained cough, sore throat, unusual bleeding, extreme tiredness, or yellow skin/eyes.
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About sodium valproate
Tipo de medicamento | Un medicamento antiepiléptico |
Usado para | Epilepsia |
También llamado | Dyzantil®; Epilim®; Episenta®; Epival®; Convulex® (as valproic acid) |
Disponible como | 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 Valproato semisódico para el trastorno bipolar para obtener más información sobre esto.
Before taking sodium valproate
Volver al contenidoSome 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 estás embarazada, intentando tener un bebé o amamantando.
Si usted o un miembro cercano de su familia tienen problemas hepáticos.
Si tienes algún problema con el funcionamiento de tus riñones.
If you have an inflammatory condition called systemic lupus erythematosus (also called lupus or SLE).
Si tienes un trastorno sanguíneo hereditario raro llamado porfiria.
If you have been told you have a mitochondrial disorder or a urea cycle disorder.
Si está tomando otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que esté disponible para comprar sin receta, así como medicamentos herbales y complementarios.
Si alguna vez has tenido una reacción alérgica a un medicamento.
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How to take sodium valproate
Volver al contenidoBefore 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.
Obteniendo el máximo de tu tratamiento
Volver al contenidoCuando comienzas un nuevo tratamiento para la epilepsia, puede haber un cambio en el número o tipo de convulsiones que experimentas. Tu médico te aconsejará al respecto.
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 antes you become pregnant.
Las personas con epilepsia deben dejar de conducir. Su médico le aconsejará sobre cuándo podría ser posible que vuelva a conducir. Esto generalmente será después de un año sin convulsiones.
While you are being treated for epilepsy there is a small risk that you may develop mood changes, distressing thoughts and feelings about suicide. If this happens, you must tell your doctor about it straightaway.
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?
Volver al contenidoAlong 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.
Very common sodium valproate side-effects (these affect more than 1 in 10 people) | ¿Qué puedo hacer si experimento esto? |
Feeling sick (nausea), stomach pain | Mantente en alimentos simples - evita comidas ricas o picantes |
Sensación de temblor | Si es problemático, hable con su médico |
Común sodium valproate side-effects (these affect fewer than 1 in 10 people) | ¿Qué puedo hacer si experimento esto? |
Pérdida de cabello | Esto suele ser temporal y el cabello vuelve a crecer (aunque puede ser más rizado que antes) |
Dolor de cabeza | Bebe mucha agua y pide a tu farmacéutico que te recomiende un analgésico adecuado. Si los dolores de cabeza continúan, informa a tu médico |
Diarrea | Bebe mucha agua para reponer los líquidos perdidos |
Sensación de sueño | Do not drive and do not use tools or machines. Do not drink alcohol |
Increased weight | Intenta llevar una dieta equilibrada y hacer ejercicio regularmente |
Uncontrolled muscle movements, lack of concentration, allergic reactions, problems with hearing | Informe a su médico sobre cualquiera de estos |
Problemas con su hígado, cambios en algunos resultados de análisis de sangre | Su médico revisará rutinariamente estos |
Importante: 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 de inmediato if you notice any of the following:
Una tos o dolor de garganta inexplicables, o cualquier sangrado o moretón inusual.
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
Volver al contenidoMantenga todos los medicamentos fuera del alcance y la vista de los niños.
Almacenar en un lugar fresco y seco, lejos del calor y la luz directos.
Información importante sobre todos los medicamentos
Volver al contenidoInformación importante sobre todos los medicamentos
Nunca tome más de la dosis prescrita. Si sospecha que usted u otra persona podría haber tomado una sobredosis de este medicamento, acuda al departamento de accidentes y emergencias de su hospital local. Lleve el envase con usted, incluso si está vacío.
Este medicamento es para ti. Nunca lo des a otras personas, incluso si su condición parece ser la misma que la tuya.
Si vas a someterte a una operación o tratamiento dental, informa a la persona que realiza el tratamiento sobre los medicamentos que estás tomando.
No guardes medicamentos caducados o no deseados. Llévalos a tu farmacia local, que se encargará de desecharlos por ti.
Si tienes alguna pregunta sobre este medicamento, consulta a tu farmacéutico.
Informar efectos secundarios de un medicamento o vacuna
Si experimenta efectos secundarios, puede reportarlos en línea a través de Yellow Card website.

¿Inseguro sobre mezclar medicamentos?
Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.
Preguntas frecuentes
What is the primary purpose of sodium valproate?
Sodium valproate is a type of antiepileptic medicine prescribed to treat epileptic disease and seizures. It works by reducing abnormal electrical activities in the brain that cause seizures.
Are there different forms of sodium valproate available?
Yes, sodium valproate is available in various forms, including tablets, crushable tablets, oral liquid medicine, modified-release tablets, modified-release capsules, and sachets. Your doctor will prescribe the most suitable form for you.
How important is it to take sodium valproate at the same time each day?
It is important to try and get into a habit of taking sodium valproate at the same time(s) each day. This helps you to remember your doses and avoid missing them, which is crucial for managing epilepsy effectively.
Can I switch between different brands of sodium valproate?
There are several brands of sodium valproate, and switching between brands made by different manufacturers could affect your treatment. Each time you collect a new supply, check if it looks the same as before. If it is different, discuss this with your pharmacist for advice.
What should I do if I experience unusual mood changes while taking sodium valproate?
While being treated for epilepsy with sodium valproate, there is a small risk of developing mood changes, distressing thoughts, or feelings about suicide. If you experience any of these, you must tell your doctor about it straightaway.
Are there any medicines I should avoid taking with sodium valproate?
Yes, medicines that contain aspirin, such as some cold or flu remedies and painkillers, can interfere with sodium valproate. Always check with a pharmacist if any over-the-counter medicines are suitable to take with your sodium valproate.
What are some of the serious side effects I should be aware of with sodium valproate?
Sodium valproate has been associated with serious unwanted effects affecting the blood, pancreas, and liver. Though less common, you must immediately tell your doctor if you notice an unexplained cough or sore throat, unusual bleeding or bruising, extreme tiredness, tummy pain, sickness, dark urine, or yellowing of your skin or eyes (jaundice).
How should I dispose of any leftover or expired sodium valproate?
Do not keep out-of-date or unwanted medicines. Take them to your local pharmacy, which will dispose of them for you safely.
Lecturas adicionales y referencias
- Manufacturer's PIL, Epilim® 200 mg and 500 mg gastro-resistant tablets; Sanofi, El Compendio Electrónico de Medicamentos. Fecha enero de 2022.
- Medicamentos Completos BNF 89ª Edición; Asociación Médica Británica y Sociedad Real de Farmacia de Gran Bretaña, Londres.
- Manufacturer's PIL, Epilim® Chrono 200 mg, 300 mg, 500 mg CR Tablets; Sanofi, The electronic Medicines Compendium. Dated January 2022
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About the authorView full bio

Michael Stewart, MRPharmS
Medicine Leaflet Review Manager – Contractor, Pharmacist
BPharm (Hons), MRPharmS
Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.
About the reviewer

Sid Dajani
Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.
Historial del artículo
La información en esta página está escrita y revisada por pares por clínicos calificados.
Próxima revisión: 4 de octubre de 2026
5 Oct 2023 | Última versión

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