Vareniclina comprimidos
Revisado por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 15 Ene 2025
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A combination of varenicline with counselling can increase your chance of successfully stopping smoking.
Empiece a tomar los comprimidos al menos una semana antes de la fecha prevista para dejar de tomarlos.
Tell your doctor if you develop any side-effects. The most commonly reported side-effects are feeling sick, problems sleeping, headache, and nose and throat infections.
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About varenicline
Tipo de medicamento | A smoking cessation aid - a selective nicotine-receptor partial agonist |
Utilizado para | Ayudar a dejar de fumar |
También llamado | Champix® |
Disponible como | Tabletas |
Nicotine is a drug that is inhaled from the tobacco in cigarettes. It gets into the bloodstream and stimulates the brain. Most regular smokers are addicted to nicotine. Even though you want to stop smoking, it can be difficult to succeed, because nicotine addiction is strong and hard to break. This is where varenicline can help.
Varenicline mimics the effect of nicotine on the body. This both reduces the urge to smoke and relieves withdrawal symptoms. It also blunts the effect of nicotine in people who give in to temptation and have a cigarette. This reduces the enjoyment of smoking.
Varenicline will not make you stop smoking. You will still need determination to succeed and to break the smoking habit. A combination of varenicline with counselling from a nurse, doctor, pharmacist, or other health professional is likely to increase your chance of successfully stopping smoking. Therefore, most doctors will only prescribe varenicline to people who really want to stop smoking as part of a stopping smoking programme.
Before taking varenicline
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 varenicline it is important that your doctor knows:
Si está embarazada, esperando un bebé o en período de lactancia.
Si es menor de 18 años.
If you have ever had a mental health problem such as depression.
If you have ever had a heart or blood vessel problem.
Si tiene algún problema con el funcionamiento de sus riñones.
Si por cualquier motivo corre el riesgo de sufrir un ataque.
Si está tomando 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 varenicline
Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about varenicline and stopping smoking. It will also provide you with a full list of the side-effects which can be associated with varenicline.
Take varenicline exactly as your doctor tells you to. You will be asked to set yourself a date on which to stop smoking. Your doctor will then ask you to start taking varenicline tablets at least a week before this 'quit' date. The aim is to build up the dose so that your body gets used to the medicine before your quit date.
Start by taking one white tablet (500 microgram) once daily for the first three days. Then on days four to seven, take one white tablet twice a day, one in the morning and one in the evening. On day eight onwards, take one light blue tablet (1 mg) twice a day. A full course of treatment lasts for 12 weeks in total. The course may be continued for a further 12 weeks if you have successfully stopped smoking but your doctor feels it will be of help to you.
It is not important whether you take varenicline tablets before or after food, but it is best if you try to take your doses at the same time(s) each day. This will help you to remember to take the tablets regularly. Take each dose with a glass of water - do not chew or break the tablets before you swallow.
If you do forget to take a dose, take it as soon as you remember unless it is nearly time for your next dose (in which case leave out the missed dose). Do not take two doses together to make up for a forgotten dose.
Aproveche al máximo su tratamiento
Try to keep your regular appointments with your doctor or nurse. This is so that you can be given counselling and encouragement, and also so that a check can be kept on your progress.
Asegúrese de que su médico o profesional sanitario sepa si está tomando otros medicamentos. Esto se debe a que dejar de fumar puede cambiar la forma en que su cuerpo descompone ciertos medicamentos. Por lo tanto, al dejar de fumar, puede ser necesario ajustar la dosis de algunos medicamentos recetados.
After your course of treatment, your doctor may suggest that you gradually reduce the dose over a week or so, before you finally stop taking varenicline. This is because a few people have experienced problems for a short time when they have stopped taking varenicline suddenly - these have included an urge to smoke again, feeling depressed or irritable, and sleeping difficulties. Although this only occurs in a small percentage of people, reducing the dose slowly reduces the risk of it happening.
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Can varenicline 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 varenicline. You will find a full list in the manufacturer's information leaflet supplied with your medicine. You should tell your doctor if you develop any unwanted effects, as a reduction in dose may be an option for you. Some of the symptoms may also occur as a result of stopping smoking.
Most common varenicline side-effects | ¿Qué puedo hacer si me ocurre esto? |
Dolor de cabeza, otros dolores | Bebe mucha agua y pide a tu farmacéutico que te recomiende un analgésico adecuado. Si los dolores persisten, informe a su médico. |
Feeling sick (nausea) or being sick (vomiting), stomach upset, indigestion | Consuma alimentos sencillos. Intente tomar los comprimidos después de las comidas |
Sensación de sueño o mareo | Do not drive or use tools or machines until you feel better |
Disturbed sleep, unusual dreams | Evite tomar la última dosis cerca de la hora de acostarse. |
Boca seca | Prueba a mascar chicle sin azúcar o chupar caramelos sin azúcar |
Nose and throat infections, change in appetite, increased weight, changes in the way things taste, feeling short of breath, cough, itchy rash | En caso de molestias, hable con su médico |
Important: if you become agitated or depressed, or if you start having thoughts about harming yourself, you must stop taking varenicline and let your doctor know straightaway. These symptoms can occasionally occur as a side-effect of treatment, and they can also occur as a result of nicotine withdrawal.
Si experimenta cualquier otro síntoma que crea que puede deberse a los comprimidos, hable con su médico o farmacéutico para que le aconsejen.
How to store varenicline
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
Si compra algún medicamento, compruebe siempre con un farmacéutico que es seguro tomarlo con sus otros 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.
This medicine is for you. Do not give it to others, even if their condition appears to be the same as yours.
Si se somete a algún tratamiento médico, comunique a la persona que lo lleve a cabo qué medicamentos está tomando.
No guarde medicamentos caducados o que no desee. Llévelos a su farmacia local, que se encargará de eliminarlos por usted.
Si tiene alguna duda sobre sus medicamentos, 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
- Manufacturer's PIL, Champix® 0.5 mg and 1 mg film-coated tablets; Pfizer Limited, The electronic Medicines Compendium. Dated October 2023.
- Manufacturer's PIL, Varenicline 0.5 mg and 1 mg film-coated tablets; Brown & Burk UK Ltd, The electronic Medicines Compendium. Dated April 2024.
- Medicamentos BNF completa 89ª edición; Asociación Médica Británica y Real Sociedad Farmacéutica de Gran Bretaña, Londres.
Historia del artículo
La información de esta página ha sido redactada y revisada por médicos cualificados.
Fecha de la próxima revisión: 14 de enero de 2028
15 Ene 2025 | Última versión

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