Clonazepam para la epilepsia
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 27 Sept 2022
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Clonazepam is prescribed to treat epilepsy. It may cause you to feel sleepy, particularly when you first start taking it, and it is likely to affect your reactions. These effects can last into the following day.
Continue to take clonazepam regularly until your doctor tells you to stop. You must not stop taking it without speaking with your doctor first, as stopping suddenly will cause problems.
Do not drink alcohol whilst you are on clonazepam.
De un vistazo
Clonazepam is a medicine used to treat epilepsy and seizures in adults and children.
It changes electrical activity in the brain to reduce the number and severity of seizures.
Take clonazepam exactly as your doctor tells you, usually once daily at bedtime.
Common side-effects include sleepiness, weakness, or light-headedness.
Do not stop taking clonazepam suddenly, as this can cause problems.
Taking clonazepam can affect your ability to drive and may lead to dependence.
About clonazepam
Tipo de medicamento | A benzodiazepine anti-epileptic medicine |
Usado para | Epilepsia |
Disponible como | Tabletas y medicina líquida oral |
Clonazepam is used to treat epileptic disease and seizures. It can be taken by adults and by children.
If you have epilepsy, it means that you have had more than one unexplained fit, or seizure. A seizure is a short episode of symptoms caused by a burst of abnormal electrical activity in your brain. Different parts of the brain control different functions of your body, so the symptoms that occur during a seizure will depend on where the abnormal burst of electrical activity occurs. Symptoms that may occur during a seizure can affect your muscles, sensations, behaviour, emotions, and consciousness, or a combination of these. The seizures can be prevented in most people by suitable anti-epileptic medication.
Clonazepam controls the symptoms of seizures by stabilising the electrical activity of your brain, which prevents the seizures from occurring. It also relaxes muscles that stiffen, or contract, during a seizure. This means that the numbers of seizures are reduced, and those that do occur, are less severe.
Before taking clonazepam
Some medicines are not suitable for people with certain conditions, and sometimes a medicine can only be used if extra care is taken. For these reasons, before you start taking clonazepam it is important that your doctor knows:
Si estás embarazada, intentando tener un bebé o amamantando.
If you have any breathing problems.
Si tienes algún problema con el funcionamiento de tu hígado, o si tienes algún problema con el funcionamiento de tus riñones.
If you have a mental health problem. This includes conditions such as psychosis, depression, obsessive conditions, phobias and personality disorders.
If you have ever had a drug or alcohol addiction.
If you have been told you have spinal or cerebellar ataxia. These are conditions where you have difficulty controlling your movements - you may become shaky and unsteady, and have slurred speech or rapid eye movements.
If you have a condition causing severe muscle weakness, called myasthenia gravis.
Si tienes un trastorno sanguíneo hereditario raro llamado porfiria.
Si alguna vez has tenido una reacción alérgica a un medicamento.
Si está tomando o usando otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que esté disponible para comprar sin receta, así como medicamentos herbales y complementarios.
How to take clonazepam
Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about clonazepam, and will also provide you with a full list of the side-effects which you could experience from taking it.
Take clonazepam exactly as your doctor tells you to - the dose will be individualised to suit your needs. You will be advised to take a small dose when you first start taking it and then to increase your dose over a few weeks as your body becomes used to it. Your doctor or pharmacist will explain this to you, and directions will also be printed on the label of the pack to remind you about what the doctor said to you.
Clonazepam is usually taken as a once-daily dose at bedtime, although some doctors may recommend that you take it divided into three or four smaller doses a day until your body has adjusted to it. Try to take clonazepam at the same time(s) each day, as this will help you to remember to take your doses regularly.
You can take clonazepam either with or without food. Swallow the tablet(s) with a drink of water.
Clonazepam is available in two strengths of tablets and several strengths of liquid medicine. Your treatment could be affected by switching between different makes of the medicine. If this is the case for you, each time you collect a new supply, check the label to make sure it is the same as you have had before or ask your pharmacist to check it out for you.
If you forget to take a dose at your usual time, take it as soon as you remember. If you do not remember until the following day, leave out the forgotten dose from the previous day and take the dose that is due that day as normal. Do not take two doses together to make up for a missed dose.
Obteniendo el máximo de tu tratamiento
Intenta mantener tus citas regulares con tu médico. Esto es para que tu médico pueda verificar tu progreso.
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.
Clonazepam can make you feel sleepy, especially when you first start treatment. Do not drink alcohol while you are on clonazepam as it will increase the likelihood that you experience this side-effect.
Mientras estás siendo tratado por epilepsia, existe un pequeño riesgo de que puedas desarrollar cambios de humor, pensamientos angustiantes y sentimientos sobre el suicidio. Si esto ocurre, debes informar a tu médico de inmediato.
People with epilepsy must stop driving at first. Your doctor will advise you about if and when it may be possible for you to start driving again. This will usually be after a year free of seizures. If you are permitted to drive, please be aware that clonazepam is likely to affect your reactions and ability to drive. It is an offence to drive while your reactions are impaired. Please also be aware that the effects of clonazepam can last into the following day. Even if your driving ability is not impaired, should you drive, you are advised to carry with you some evidence that the medicine has been prescribed for you - a repeat prescription form or a patient information leaflet from the pack is generally considered suitable.
Taking clonazepam over a period of time can make you become tolerant to it. If this happens, it will not be as effective for you as it once was. If you think this is happening to you, please discuss it with your doctor.
Taking benzodiazepines like clonazepam can lead to the development of dependence. This means that your body becomes dependent on the medicine. If you are concerned about this, you should discuss it with your doctor.
Many antiepileptic medicines can harm an unborn child. If you are a woman, make sure you have discussed with your doctor which types of contraception are suitable for you and your partner. If you want to have a family, discuss this with your doctor so that you can be given advice from a specialist antes te quedas embarazada.
Si tienes programada una operación o cualquier tratamiento dental, informa a la persona que realizará el tratamiento sobre los medicamentos que estás tomando.
You need to take clonazepam regularly every day. Do not stop taking it until your doctor tells you to stop. Stopping treatment suddenly can cause problems and your doctor will want you to reduce your dose gradually when this becomes necessary.
Can clonazepam 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 more common ones associated with clonazepam. The best place to find a full list of the side-effects which can be associated with your medicine, is from the manufacturer's printed information leaflet supplied with the medicine. Alternatively, you can find an example of a manufacturer's information leaflet in the reference section below. Speak with your doctor or pharmacist if any of the following continue or become troublesome.
Common clonazepam side-effects | ¿Qué puedo hacer si experimento esto? |
Feeling sleepy, weak, or light-headed (these can continue into the following day) | Do not drive and do not use tools or machines. Do not drink alcohol |
Feeling unsteady, poor co-ordination, unusual eye movements, poor concentration, feeling forgetful or confused | If any of these become troublesome, discuss them with your doctor |
In young children, increased amounts of saliva may lead to coughing or choking | Let your doctor know if this happens |
Si experimenta otros síntomas que cree que pueden deberse al medicamento, hable con su médico o farmacéutico para obtener más consejos.
How to store clonazepam
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 usually lasts for one month after first opening, but always check the expiry date on the medicine you are supplied with. It is a good idea to write the date you opened the bottle on to the label.
Información importante sobre todos los medicamentos
Información importante sobre todos los medicamentos
Never take more than the prescribed dose. If you suspect that you or someone else might have taken an overdose of this medicine, go to the accident and emergency department of your local hospital at once. Take the container with you, even if it is empty, so the doctor knows what has been taken.
Este medicamento es para ti. Nunca lo des a otras personas, incluso si su condición parece ser la misma que la tuya.
Si compras algún medicamento, consulta con un farmacéutico que sea seguro tomarlo junto con tus otros medicamentos.
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 Sitio web de Yellow Card.

¿Inseguro sobre mezclar medicamentos?
Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.
Preguntas frecuentes
Can I drink alcohol while taking clonazepam?
No, you should not drink alcohol while taking clonazepam. Alcohol can increase the likelihood of experiencing side-effects, particularly feeling sleepy, which clonazepam can also cause, especially when you first start treatment.
What should I do if I forget to take a dose of clonazepam?
If you forget to take a dose at your usual time, take it as soon as you remember. However, if you do not remember until the following day, you should skip the forgotten dose from the previous day and take your next dose as normal. Do not take two doses at once to compensate for a missed dose.
How long does clonazepam oral liquid medicine last once opened?
Clonazepam oral liquid medicine typically lasts for one month after it has been opened. It is a good practice to write the date you opened the bottle on the label to help you keep track of its expiry.
Can clonazepam affect my ability to drive?
Yes, clonazepam is likely to affect your reactions and ability to drive. Even if you are permitted to drive (after being seizure-free for a year, as advised by your doctor), the effects of clonazepam can last into the following day. It is an offence to drive while your reactions are impaired.
What should I do if I become tolerant to clonazepam?
If you find that clonazepam is no longer as effective for you as it once was, this could indicate that you have developed a tolerance to the medicine. You should discuss this with your doctor, as they may need to adjust your treatment plan.
How do I ensure I receive the same type of clonazepam if I use different strengths?
Clonazepam is available in different tablet strengths and several strengths of liquid medicine, and switching between different manufacturers might affect your treatment. Each time you collect a new supply, check the label to ensure it's the same as you've had before, or ask your pharmacist to verify it for you.
Lecturas adicionales y referencias
- Manufacturer's PIL, Clonazepam Rosemont 0.5 mg/5 ml Oral Solution; Rosemont Pharmaceuticals Ltd, The electronic Medicines Compendium. Dated January 2020.
- Medicamentos Completos BNF 89ª Edición; Asociación Médica Británica y Sociedad Real de Farmacia de Gran Bretaña, Londres.
Sobre el autorVer biografía completa

Helen Allen, MPharm
Farmacéutico, Autor Médico
MPharm
Helen Allen se graduó como farmacéutica en 1979 y pasó 3 años como autora de los folletos de información sobre medicamentos para EMIS.
Acerca del revisor

Sid Dajani
Sultan Dajani se graduó en la Escuela de Farmacia de Londres en 1994 y se convirtió en el miembro más joven elegido para el consejo de la Sociedad Real de Farmacia desde su fundación en 1842.
Historial del artículo
La información en esta página está escrita y revisada por pares por clínicos calificados.
Artículo también disponible en Inglés, Alemán, Español, Francés, Italiano, Portugués, Hindi, Hebreo, Árabe, y Sueco.
Próxima revisión: 25 Mar 2027
27 Sept 2022 | Última versión
27 Apr 2010 | Publicado originalmente
Escrito por:
Helen Allen, MPharm

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