Tabletas de Leflunomida para la artritis
Arava
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 7 Jun 2025
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Leflunomide is prescribed by specialist doctors.
It may take several weeks before you start to feel the benefit of the treatment. This is normal.
Do not drink alcohol whilst you are taking leflunomide - it will increase the risk of damage to your liver.
Leflunomide can harm an unborn baby - use suitable contraception so that you do not become pregnant or father a child.
De un vistazo
Leflunomide is a medicine for rheumatoid arthritis and psoriatic arthritis.
It helps ease joint pain and stiffness, and reduces joint damage.
Take one tablet daily, with or without food.
It can take several weeks to notice the effect, and several months for full benefit.
No beba alcohol mientras tome este medicamento.
If female, you must not get pregnant during treatment and for two years afterwards.
If male, you must not father a child during treatment and for three months afterwards.
About leflunomide
Tipo de medicamento | A disease-modifying antirheumatic medicine |
Usado para | Rheumatoid arthritis; psoriatic arthritis |
También llamado | Arava® |
Disponible como | Comprimidos |
Arthritis means inflammation of joints. Artritis reumatoide (RA) is a common form of arthritis. It is thought to be an autoimmune disease. The immune system normally makes small proteins (antibodies) to attack bacteria, viruses and other germs. In people with autoimmune diseases, the immune system makes antibodies against tissues of the body. In people with RA, antibodies are formed against the tissues that surround the joints. This causes inflammation, pain, and swelling around the affected joints. Over time, it causes damage. Medicines called disease-modifying antirheumatic drugs (DMARDs) are prescribed to suppress the inflammation.
Artritis psoriásica is a particular type of arthritis that develops in some people who also have a skin condition called psoriasis.
Leflunomide is a DMARD. It eases pain and stiffness associated with both of the conditions mentioned above, and it also reduces the damaging effect of the disease on joints. It is thought to work by blocking the way inflammation develops in joints.
Before taking leflunomide
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 leflunomide 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 si tienes algún problema con el funcionamiento de tus riñones.
If you currently have an infection, or if you have ever had tuberculosis (TB).
If you have been told by a doctor that you have low numbers of proteins in your blood.
If you know you have a blood or bone marrow disorder.
If you have a problem which affects your immune system, such as AIDS.
Si alguna vez has tenido una reacción alérgica a un medicamento.
Si está tomando otros medicamentos. Esto incluye cualquier medicamento que se pueda comprar sin receta, así como medicamentos herbales y complementarios.
How to take leflunomide
Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about leflunomide and how to take it, and it will also provide you with a full list of the side-effects which you could experience
If you have recently taken another DMARD, your doctor will want to make sure that all of this medicine has gone from your bloodstream before you start taking leflunomide. This is called a washout procedure. It is important that you follow any directions that you are given to do this.
Take leflunomide exactly as your doctor tells you to. It is taken once a day. Your doctor will prescribe a high-strength (100 mg) tablet for the first three days. After this, the strength of your tablets will be reduced to 10 mg or 20 mg, and you will stay on this lower dose.
Swallow the tablet with a drink of water. You can take leflunomide either with or without food. Swallow the tablet whole - do not chew or break it.
Try to take leflunomide at the same time of day each day, as this will help you to remember to take it regularly, every day. If you forget to take a dose, 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 as normal. Do not take two doses at the same time to make up for a missed dose.
Obteniendo el máximo de tu tratamiento
Try to keep your regular appointments with your doctor. This is so your doctor can check on your progress. Your doctor will want you to have some blood tests before and during the treatment.
Leflunomide may have no immediate effect on pain or inflammation. It can take several weeks before you notice any effect, and several months before you notice the full benefit. It is, however, important that you keep taking it as prescribed, even if it does not seem to be working at first.
Your doctor will recommend that you do not drink alcohol while you are on leflunomide. This is because it can increase the risk of side-effects, such as liver problems.
This medicine can harm an unborn baby:
Si eres femenino, you must not get pregnant while you are taking leflunomide and for at least two years afterwards. Make sure you have discussed with your doctor what contraception is suitable for you and your partner. If you wish to have a baby after finishing treatment, you should discuss this with your doctor, as the medicine continues in your bloodstream for up to two years.
Si eres masculino you must not father a child while you are taking leflunomide and for at least three months afterwards. Ask your doctor about suitable contraception. If you wish to become a father, you should discuss this with your doctor. It is important that it is confirmed that leflunomide has been sufficiently removed from your body before you father a child.
Your doctor will discuss with you the possibility of unwanted side-effects, such as that you could become more susceptible to infections. Also, that there is a slightly increased risk of cancer associated with this medicine. If you have any concerns about your general health, discuss these with your doctor straightaway.
While you are taking leflunomide, do not have any immunisations (vaccinations) without talking to your doctor first. Leflunomide lowers your body's resistance and there is a chance that you may get an infection from the vaccine. Also, some vaccines may be less effective.
Before you have any kind of medical treatment, tell the doctor, dentist or surgeon that you are taking leflunomide. People taking leflunomide may be more likely to have problems with wound-healing after surgery.
Treatment with leflunomide is usually long-term unless you experience an adverse effect. Continue to take the tablets unless you are advised otherwise.
Can leflunomide 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 leflunomide. 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 leflunomide side-effects (these affect fewer than 1 in 10 people) | ¿Qué puedo hacer si experimento esto? |
Increased susceptibility to infections | Contact your doctor if you feel unwell |
Diarrea | Bebe mucha agua para reponer los líquidos perdidos |
Feeling sick (nausea) or being sick (vomiting), tummy (abdominal) pain | Stick to simple foods - avoid fatty or spicy meals. Try taking the tablets after food |
Sensación de mareo o cansancio | No conduzca ni utilice herramientas o máquinas mientras esté afectado |
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 |
Increased blood pressure, loss of appetite, mouth ulcers, tingling feelings, tendon inflammation, increased hair loss, itchy skin rash, dry skin | If any of these become troublesome, discuss them with your doctor |
Si experimenta cualquier otro síntoma que crea que puede deberse a las tabletas, hable con su médico o farmacéutico para obtener más consejos.
How to store leflunomide
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 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
What is the likelihood of having problems with wound healing after surgery if I'm taking leflunomide?
People who are taking leflunomide may be more prone to experiencing issues with wound healing following any surgical procedures. It is essential to inform your doctor, dentist, or surgeon that you are on leflunomide before undergoing any medical treatment.
How long will I generally need to take leflunomide?
Treatment with leflunomide is typically long-term. You should continue taking the tablets as prescribed unless your doctor advises you otherwise, or if you experience an adverse side effect that requires stopping the medication.
What should I do if I suspect I've taken too much leflunomide?
If you or someone else might have taken an overdose of leflunomide, you should go to the accident and emergency department of your local hospital immediately. Remember to take the medicine container with you, even if it is empty.
Why shouldn't I share my leflunomide with someone else?
Leflunomide is prescribed specifically for your condition. It should never be given to other people, even if their symptoms appear to be similar to yours, as it might not be safe or appropriate for them.
What should I do with leflunomide tablets that are out-of-date or no longer needed?
You should not keep out-of-date or unwanted medicines. Take them to your local pharmacy, as they are equipped to dispose of them safely and properly for you.
Lecturas adicionales y referencias
- Manufacturer's PIL, Arava® 10 mg tablets; Sanofi, The electronic Medicines Compendium. Dated September 2024.
- Medicamentos Completos BNF 89ª Edición; Asociación Médica Británica y Sociedad Real de Farmacia de Gran Bretaña, Londres.
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.
Next review due: 7 Jun 2028
7 Jun 2025 | Última versión

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