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Baclofen for chronic muscle spasm

Lyflex, Lioresal

When you start this treatment, your doctor will give you a small dose and then gradually increase it. This is to reduce side-effects such as drowsiness.

Take baclofen with a meal or a snack, and try not to miss any doses.

The most common side-effects are feeling sleepy and problems with mobility.

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About baclofen

Tipo de medicamento

Skeletal muscle relaxant

Utilizado para

To relieve muscle spasms

También llamado

Lyflex®; Lioresal®

Disponible como

Comprimidos, líquido oral e inyección

Long-term (chronic) muscle stiffness can occur in multiple sclerosis and in conditions where there has been damage to nerves that supply muscles. In these conditions, the muscles shorten (contract) tightly, and can then become stiff and harder to use. This is called muscle spasticity.

Baclofen works by relaxing the muscles, which reduces pain and discomfort.

Before taking baclofen

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 baclofen it is important that your doctor or pharmacist knows:

  • Si está embarazada, esperando un bebé o en período de lactancia.

  • Si alguna vez ha tenido una úlcera de estómago.

  • If you have kidney or liver problems, or an 'overactive' bladder.

  • If you have ever had a stroke, or if the blood vessels to your brain are narrowed by cerebrovascular disease.

  • If you have high blood pressure (hypertension).

  • If you have epilepsy, Parkinson's disease or diabetes.

  • If you have any mental health problems.

  • If you have problems with your breathing.

  • If you have ever had problems with drug or alcohol misuse.

  • Si toma o utiliza otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que pueda adquirirse sin receta, así como medicamentos a base de plantas y complementarios.

  • Si alguna vez ha tenido una reacción alérgica a un medicamento.

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How to take baclofen

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

  • When starting this treatment, your doctor will give you a small dose (usually half a tablet three times daily) and then gradually increase your dose every three days or so. This allows your doctor to make sure that you have the dose that helps your condition and avoids any unwanted symptoms.

  • Take the tablets exactly as your doctor tells you to. Your dose will be on the label of the pack to remind you.

  • When baclofen is prescribed for a child, it is likely that a liquid medicine will be supplied. Check the directions on the label carefully, as the dose will depend upon their body weight.

  • Take baclofen with a snack or just after eating a meal.

  • Try to take your doses at the same times of day each day, as this will help you to remember to take them. If you do forget to take a dose, skip the missed dose but remember to take your next dose when it is due. Do not take two doses together to make up for a forgotten dose.

Aproveche al máximo su tratamiento

  • Procure acudir a las citas periódicas con su médico. Así podrá comprobar su evolución.

  • Baclofen may cause drowsiness and eyesight problems. If this happens, do not drive and do not use tools or machines until you feel better.

  • If your muscle spasms increase or if you have difficulty doing things because you feel your muscles have become weak, let your doctor know about this, as your dose may need adjusting.

  • It is recommended that you do not drink alcohol while you are on baclofen. This is because it increases the chance that you will experience side-effects such as feeling sleepy or dizzy.

  • Treatment with baclofen is usually long-term, so keep taking these tablets unless your doctor tells you otherwise. Suddenly stopping treatment can cause problems, so your doctor is likely to want you to reduce your dose gradually if this is necessary.

  • Si va a someterse a una operación o a un tratamiento dental, comunique a la persona que lleve a cabo el tratamiento qué medicamentos está tomando.

  • Si compra algún medicamento, compruebe con un farmacéutico que es seguro tomarlo con sus otros medicamentos.

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Can baclofen 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 baclofen. 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.

Common baclofen side-effects

¿Qué puedo hacer si me ocurre esto?

Feeling sleepy, tired, dizzy or weak

Si esto ocurre, no conduzca ni utilice herramientas o máquinas.

Feeling sick (nausea), upset stomach or loose, watery stools (diarrhoea)

Drink plenty of water and stick to simple foods - avoid rich or spicy meals

Dolor de cabeza

Bebe mucha agua y pide a un farmacéutico que te recomiende un analgésico adecuado. Si los dolores de cabeza persisten, informe a su médico.

Boca seca

Prueba a mascar chicle sin azúcar o chupar caramelos sin azúcar

Mobility problems, eyesight problems, breathing difficulties, aching muscles, sleeping difficulties, mood changes, confusion, needing to pass urine more often, feeling shaky or faint, increased sweating, and rash

Si alguno de ellos le resulta molesto, coméntelo con su médico

Si experimenta cualquier otro síntoma que considere que puede deberse a este medicamento, consulte a su médico o farmacéutico.

How to store baclofen

  • Mantenga todos los medicamentos fuera del alcance y de 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

Información importante sobre todos los medicamentos

No tome nunca más de la dosis prescrita. Si sospecha que usted u otra persona ha tomado una sobredosis de este medicamento, acuda al servicio de urgencias de su hospital. Llévese el envase, aunque esté vacío.

Este medicamento es para usted. Nunca se lo dé a otras personas aunque su enfermedad parezca ser la misma que la suya.

No guarde medicamentos caducados o que no desee. Llévelos a su farmacia local, que se encargará de eliminarlos por usted.

Si tiene cualquier duda sobre este medicamento pregunte a su farmacéutico.

Informar de los efectos secundarios de un medicamento o vacuna

Si experimenta efectos secundarios, puede notificarlos en línea a través del sitio web de la Tarjeta Amarilla.

Lecturas complementarias y referencias

Historia del artículo

La información de esta página ha sido redactada y revisada por médicos cualificados.

  • Next review due: 6 Oct 2025
  • 7 Oct 2022 | Latest version

    Última actualización

    Michael Stewart, MRPharmS

    Revisado por expertos

    Sid Dajani
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