Eletriptán para la migraña
Relpax
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 19 Jun 2023
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Eletriptan is used to treat migraine headaches with or without aura.
Take one tablet as soon as you start to feel a migraine headache develop. Do not take it before the headache begins (for example, during the 'aura phase'), as it may be less effective.
Your chest may feel tight or 'heavy' after taking eletriptan. These sensations do not usually last for long, but if they continue or become intense, do not take any more tablets, and let your doctor know as soon as possible.
Eletriptan can make you feel sleepy. If this happens, do not drive and do not use tools or machines.
De un vistazo
Eletriptan (Relpax®) is a triptan medicine used to treat acute migraine attacks.
It works by stimulating serotonin receptors in the brain to ease migraine symptoms.
Take one tablet as soon as a migraine headache starts.
Do not take more than two 40 mg tablets in 24 hours.
If your migraine returns, you can take a second tablet after at least two hours.
Do not take a second tablet if the first one did not ease your migraine.
Some side-effects include tiredness, sickness, and a 'cold-like' feeling.
About eletriptan
Tipo de medicamento | 5HT1-receptor agonist (also known as a 'triptan') |
Usado para | Treatment of acute migraine attacks |
También llamado | Relpax® |
Disponible como | Comprimidos |
It is not clear what causes migraña. It is thought that some chemicals in the brain increase in activity, and as a result parts of the brain then send out confused signals which result in the symptoms of migraine. Why people with migraine should develop these chemical changes is also not clear. Many migraine attacks occur for no apparent reason, but for some people there may be things which trigger an attack, like certain foods or drinks.
Eletriptan belongs to a class of medicines known as 5HT1-receptor agonists. They are also known simply as triptans. Triptans work by stimulating the receptors of a natural substance in the brain called serotonin (or 5HT). This eases the symptoms of migraine.
Eletriptan is effective in relieving migraine attacks once the headache phase has started. It does not help prevent migraine headaches from developing.
Before taking eletriptan
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 eletriptan it is important that your doctor or pharmacist knows:
If you are aged over 65 years or under 18 years.
Si estás embarazada o amamantando.
If you have heart problems such as an irregular heartbeat or angina, or if you have had a heart attack.
Si tienes presión arterial alta (hipertensión).
If you have circulation problems.
Si tiene algún problema con el funcionamiento de su hígado o de sus riñones.
If you have ever had a stroke or a transient ischaemic attack (this is also referred to as a TIA, or 'mini-stroke').
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 eletriptan
Before you start this treatment, read the manufacturer's printed information leaflet from inside your pack. The manufacturer's leaflet will give you more information about eletriptan and a full list of the side-effects which you may experience from taking it.
Take eletriptan exactly as your doctor tells you to. It is usual to take one tablet as soon as you start to feel a migraine headache develop. Swallow the tablet with a drink of water.
If your migraine at first improves but then comes back again, you may take another tablet, providing it is at least two hours after you took the first one. If your migraine is not eased after taking the first tablet, a further dose is unlikely to work, so do not take a second tablet.
Do not take more than two 40 mg tablets in 24 hours.
Obteniendo el máximo de tu tratamiento
Eletriptan is meant to be used to treat headache pain during a migraine attack, not to stop the pain from coming on. You should wait until the pain is just beginning to develop, rather than taking it at the aura stage or when you feel that a migraine may be developing. Taking it earlier in a migraine attack will not stop the headache from developing.
You should not take other migraine treatments such as other triptans or ergotamine at the same time as eletriptan.
Some people may benefit from taking a non-steroidal anti-inflammatory painkiller (such as naproxen) in addition to eletriptan. Your doctor will advise you about this if it is recommended for you.
If you find that eletriptan does not relieve your migraine, make an appointment to discuss this with your doctor, as a different 'triptan' medicine may be more effective for you.
If you buy any 'over-the-counter' medicines, check with your pharmacist which medicines are safe for you to take.
It may help to keep a migraine diary. Note down when and where each migraine attack started, what you were doing, and what you had eaten that day. A pattern may emerge, and it may be possible to avoid one or more things that trigger your migraine attacks.
Eletriptan is used to treat migraine attacks, but there are other medicines that are available that may help to prevent you from having migraines. If you have migraines frequently, discuss this with your doctor.
Some people who get frequent migraine attacks are in fact getting medication-induced headache. Medication-induced headache (also called medication-overuse headache) is caused by taking painkillers or triptans too often. If you use eletriptan or painkillers on more than two days a week on a regular basis, you may be at risk of this. You should talk with your doctor if you suspect it.
Can eletriptan 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 eletriptan. 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.
Común eletriptan side-effects (these affect fewer than 1 in 10 people) | ¿Qué puedo hacer si experimento esto? |
Feeling tired, dizzy or sleepy | Si esto sucede, no conduzcas y no uses herramientas ni máquinas |
Feeling sick (nausea), indigestion (reflux) | Mantente con alimentos simples |
'Cold-like' symptoms (such as chills, sore throat and runny nose), tingling feelings, feeling hot and flushed, the sensation of having a 'thumping heart' (palpitations), dry mouth | Si es problemático, hable con su médico |
Some people feel tightness or pain in their throat or chest | If the pain is intense, do not take any further tablets and speak with your doctor about it |
If you experience any other symptoms which you think may be due to the tablets, speak with your doctor or pharmacist.
How to store eletriptan
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.
Información importante sobre todos los medicamentos
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 a un 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 Sitio web de Yellow Card.

¿Inseguro sobre mezclar medicamentos?
Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.
Preguntas frecuentes
How long does eletriptan take to start working after I take it?
The article states that eletriptan is effective in relieving migraine attacks once the headache phase has started, but it does not specify an exact timeframe for how quickly it starts to work. It should be taken as soon as a migraine headache develops.
Can eletriptan prevent migraine headaches from occurring?
No, eletriptan does not prevent migraine headaches from developing. It is specifically designed to treat an acute migraine attack once the headache phase has started. If you have frequent migraines, you should discuss preventative treatments with your doctor.
What should I do if my migraine doesn't improve after taking the first eletriptan tablet?
If your migraine is not eased after taking the first tablet of eletriptan, a further dose is unlikely to work, so you should not take a second tablet. Instead, you should discuss this with your doctor, as a different 'triptan' medicine may be more effective for you.
Are there any specific foods or drinks I should avoid while taking eletriptan?
The article mentions that for some people, certain foods or drinks may trigger a migraine attack, but it does not list specific items to avoid when taking eletriptan. Keeping a migraine diary can help you identify your personal triggers.
Can I take eletriptan if I am currently taking other medications for other health conditions?
Before taking eletriptan, it is important that your doctor or pharmacist knows about all other medicines you are taking. This includes prescription, over-the-counter, herbal, and complementary medicines, as some medicines may not be suitable in combination with eletriptan.
Lecturas adicionales y referencias
- Manufacturer's PIL, Relpax® 20 mg and 40 mg Film-Coated Tablets; Upjohn UK Limited, The electronic Medicines Compendium. Dated June 2022.
Sobre el autorVer biografía completa

Michael Stewart, MRPharmS
Gerente de Revisión de Folletos de Medicamentos – Contratista, Farmacéutico
BPharm (Hons), MRPharmS
Michael es un farmacéutico comunitario que ejerce en Midlands y South Yorkshire con más de 20 años de experiencia asesorando sobre medicamentos y condiciones médicas. Tiene una sólida formación en capacitación en atención médica, habiendo producido e impartido cursos de formación para equipos de farmacia y personal de entornos de atención residencial, incluidas enfermeras. También ha contribuido a juntas asesoras de farmacia para la gestión de condiciones de baja gravedad en la comunidad.
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: 18 de diciembre de 2027
19 Jun 2023 | Última versión

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