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Valsartan - an angiotensin receptor blocker

You can take valsartan either before or after a meal.

Any side-effects are usually mild. The most common side-effect is dizziness.

Some painkillers may interfere with valsartan and increase the risk of side-effects, so ask a pharmacist for advice before you buy any medicines.

Clinical author's note: Michael Stewart 15/11/2018:Following an MHRA update, new advice has been added to this leaflet for people also taking the blood pressure medicine hydrochlorothiazide. Hydrochlorothiazide is only available in the UK in combination with other blood pressure medicines such as valsartan. It may be available on its own in other countries. For more information see 'Getting the most from your treatment' below or view the Alerta de la MHRA.

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About valsartan

Tipo de medicamento

An angiotensin-II receptor antagonist

Usado para

Hypertension; heart failure; to protect the heart

También llamado

Diovan®;
Combination brands: Co-Diovan® (valsartan with hydrochlorothiazide); Exforge® (valsartan with amlodipina); Entresto® (valsartan with sacubitril)

Disponible como

Tabletas, cápsulas y medicina líquida oral

Valsartan is an angiotensin receptor blocker. It is also called an angiotensin-II receptor antagonist, or an AIIRA. You will have been prescribed valsartan either because your blood pressure is too high (hypertension), or because your heart is not working as well as it should (insuficiencia cardíaca), or to protect your heart if you have recently had a heart attack.

Valsartan works by blocking the effect of a chemical called angiotensin II. Angiotensin II causes your blood vessels to narrow, so by blocking its effect valsartan allows your blood vessels to relax and widen. As this happens, the pressure within your blood vessels is reduced and it is easier for your heart to pump blood around your body. Valsartan also helps to protect the heart following a heart attack.

Valsartan may be prescribed on its own to treat high blood pressure, or you may also be given other medicines to take alongside it. This is because a combination of medicines which work in different ways can often lower your blood pressure more than one medicine on its own. Combination brands which contain valsartan alongside other medicines for high blood pressure include Co-Diovan® and Exforge®. Being prescribed a combination brand like these will help to reduce the number of tablets you need to take each day.

One combination brand, called Entresto®, is prescribed for heart failure and contains valsartan with sacubitril.

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 valsartan it is important that your doctor knows:

  • Si estás embarazada, intentando tener un bebé o amamantando.

  • If you have a problem with your kidneys, particularly if it is a blockage of the artery which supplies blood to your kidneys.

  • If you have any problems with your heart valves or heart muscle.

  • If you have a problem with the way your liver works, or if you have a condition which blocks the flow of bile from your liver.

  • Si está tomando otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que esté disponible para comprar sin receta, así como medicamentos herbales y complementarios.

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

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

  • Take valsartan exactly as your doctor tells you to. You may be asked to take valsartan once or twice a day depending on the reason why you are taking it. When you first start treatment, your doctor may gradually increase the strength of your dose to suit your condition. There are several different strengths of tablet/capsule available, so each time you collect a fresh supply, it's a good idea to check the strength on the packet to make sure they are what you are expecting.

  • Try to take valsartan at the same time(s) of day each day. Taking your doses at the same times will help you to remember to take valsartan regularly.

  • Swallow the tablet/capsule with a drink of water. You can take valsartan either before or after a meal.

  • Si olvida tomar una dosis, tómela tan pronto como lo recuerde. Si cuando lo recuerda, ya es casi la hora de su próxima dosis, entonces tome su próxima dosis cuando corresponda, pero omita la dosis olvidada. No tome dos dosis juntas para compensar una dosis olvidada.

  • Try to keep your regular appointments with your doctor. This is so your progress can be monitored and your blood pressure measured. Your doctor may want you to have some blood tests from time to time to check on your kidneys, and also how much potassium is in your blood.

  • If you buy any medicines, check with a pharmacist that they are suitable to take with valsartan. This is because some anti-inflammatory painkillers (such as aspirin and ibuprofen) may interfere with the way it works, and also may increase the risk of side-effects.

  • It is very important that you follow any dietary and lifestyle advice that you may have been given by your doctor, such as eating a healthy diet, not smoking, and taking regular exercise.

  • If you drink alcohol, ask your doctor for advice. Your doctor may recommend that you do not drink alcohol while you are on valsartan because it will increase the risk of side-effects, such as feeling dizzy or faint.

  • Try to avoid salt substitutes which contain potassium. This is because the substitutes will increase the amount of potassium in your blood and this can cause problems.

  • If you are having an operation or dental treatment, tell the person carrying out the treatment that you are taking valsartan. This is because your blood pressure may drop too low if you are given some anaesthetics.

  • Treatment with valsartan is often long-term unless you experience an adverse effect. Continue to take it regularly, unless you are advised otherwise by your doctor.

Si también está tomando hidroclorotiazida en combinación con este medicamento

  • Los estudios han sugerido que tomar dosis más altas de hidroclorotiazida durante largos períodos de tiempo puede aumentar el riesgo de ciertos tipos de cáncer de piel.

  • Informe a su médico si alguna vez ha sido tratado por cáncer de piel.

  • Informe a su médico sobre cualquier lunar nuevo o cambiado, o marcas preocupantes en su piel.

  • Use a sunscreen in strong sunlight. Do not use sunbeds.

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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 valsartan. 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.

Valsartan side-effects


¿Qué puedo hacer si experimento esto?

Feeling tired or dizzy

No conduzca ni utilice herramientas o máquinas mientras esté afectado

Tummy (abdominal) pain, cough, headache, stomach upset

Si es problemático, hable con su médico

Importante: valsartan has been associated with an allergic-type reaction in a few people. Although this occurs only rarely, if you get any swelling of your mouth or face, speak with your doctor or go to your local accident and emergency department straightaway.

Si experimenta cualquier otro síntoma que crea que puede deberse a las tabletas, hable con su médico o farmacéutico para obtener más consejos.

  • 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

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.

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.

MHRA - Reporte de reacciones adversas

Informe los efectos secundarios sospechosos de medicamentos, vacunas, cigarrillos electrónicos, incidentes con dispositivos médicos, productos defectuosos o falsificados (falsos) a la Agencia Reguladora de Medicamentos y Productos Sanitarios para garantizar un uso seguro y efectivo.

verificador de síntomas

¿Inseguro sobre mezclar medicamentos?

Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.

Lecturas adicionales y referencias

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Historial del artículo

La información en esta página está escrita y revisada por pares por clínicos calificados.

  • Siguiente revisión prevista: 17 de diciembre de 2026
  • 18 Dic 2023 | Última versión

    Última actualización por

    Michael Stewart, MRPharmS

    Revisado por pares por

    Sid Dajani
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