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Topiramate for epilepsy

Topamax

Clinical author's note: Michael Stewart 25/06/2024: the Medicines and Healthcare products Regulatory Agency (MHRA) has introduced new pregnancy safety measures for women and girls needing treatment with topiramate (Topamax®).

Due to an increased risk of birth defects you should not become pregnant whilst taking topiramate. A pregnancy test will be required before your doctor will start treatment with this medicine. Women and girls of childbearing potential must use effective contraception during treatment with topiramate. Some types of hormonal contraception are less effective when taking this medicine. Make sure you have discussed with your doctor which types of contraception are suitable.

If you are already taking topiramate for epilepsy and think you may be pregnant, do not stop taking your medication. Epileptic seizures can also harm an unborn baby. Make an appointment to see your doctor as soon as possible.

Speak with your doctor if you are planning to become pregnant or think you may be pregnant whilst taking this medicine.

Take topiramate regularly every day, and drink plenty of water.

If you become depressed or develop any problems with your eyesight, make an appointment to see your doctor straightaway.

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About topiramate

Tipo de medicamento

Un medicamento antiepiléptico

Usado para

Epilepsy, prevention of migraine

También llamado

Topamax®

Disponible como

Tablets and Sprinkle® capsules, oral liquid medicine

Topiramate is prescribed alone or alongside other medicines 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. Topiramate is thought to work mainly by reducing these abnormal electrical activities.

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 topiramate it is important that your doctor knows:

  • Si estás embarazada, intentando tener un bebé o amamantando.

  • Si tienes algún problema con el funcionamiento de tu hígado, o con el funcionamiento de tus riñones.

  • Si tienes un trastorno sanguíneo hereditario raro llamado porfiria.

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

  • Take topiramate exactly as your doctor tells you to. It is usual for adults to start topiramate treatment on a low dose (25 mg at night), and then for the dose to be increased gradually to a regular maintenance dose, which is taken twice daily. Doses for children are tailored to their age and weight.

  • Swallow topiramate tablets with a drink of water. Do not chew the tablets as they have a bitter taste. If you have been prescribed capsules, you can swallow the capsules in the normal way with a drink of water or, if you prefer, you can open up the capsule and sprinkle the contents on to a spoonful of some soft food (porridge, yoghurt or custard for example). Do not chew the contents of the capsules.

  • It is important that you drink plenty of water while you are taking topiramate. This is because there is a slight risk that kidney stones can develop and drinking plenty of water reduces this risk.

  • Try to get into a habit of taking topiramate at the same time(s) each day. You can take topiramate before or after food.

  • Si olvida tomar una dosis, tómela tan pronto como lo recuerde, a menos que esté cerca la hora de su próxima dosis, en cuyo caso omita la dosis olvidada. No tome dos dosis juntas para compensar una dosis olvidada.

  • Try to keep your regular appointments with your doctor. This is so your doctor can check on your progress. You may need to have eye tests and weight checks from time to time.

  • Cuando 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.

  • Several different manufacturers make topiramate tablets and capsules, and your treatment could be affected by switching between different formulations. Each time you collect a new supply from your pharmacy, check to see if the tablets/capsules are the same as you have had before. If they are different, discuss this with your pharmacist who will advise you.

  • You need to take topiramate every day. Stopping treatment suddenly can cause problems and your doctor may want you to reduce your dose over a few days if this becomes necessary.

  • You must avoid getting pregnant while you are taking topiramate. 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, make sure you discuss this with your doctor. This is so that you can be given advice from a specialist before 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.

  • Si compras algún medicamento, siempre consulta con un farmacéutico que sean adecuados para tomar con tus otros medicamentos.

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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 topiramate. 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

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

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Sentirse mal (náuseas)

Mantente en alimentos simples - evita comidas ricas o picantes

Feeling sleepy, dizzy or tired

Si esto sucede, no conduzcas y no uses herramientas ni máquinas

Diarrea

Bebe mucha agua para reponer los líquidos perdidos

Feeling depressed

If this continues, let your doctor know (see also below)

Nose and throat problems, tingling feelings, loss of weight

If any become troublesome, speak with your doctor for advice

Importante: topiramate has been associated with a number of serious unwanted effects. Although these occur less commonly than the side-effects listed above, you must let your doctor know de inmediato if you notice either of the following:

  • Problems with your eyesight.

  • Mood changes, distressing or depressed thoughts, or feelings about suicide.

If you experience other symptoms which you think may be due to the medicine, speak with your doctor or pharmacist for further advice.

  • Mantenga 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.

  • The oral liquid medicine keeps for one month after first opening. After this time make sure you use a new bottle. It is a good idea to write the date you opened the bottle on the label.

Información 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.

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Lecturas adicionales y referencias

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Historial del artículo

La información en esta página está escrita y revisada por pares por clínicos calificados.

  • Próxima revisión: 18 de septiembre de 2026
  • 25 Jun 2024 | Última versión

    Última actualización por

    Michael Stewart, MRPharmS

    Revisado por pares por

    Sid Dajani
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