Valsartan

What is valsartan?

Valsartan is a prescription medicine used to treat high blood pressure, heart failure, and certain heart-related conditions after a heart attack. It belongs to a group of medicines called angiotensin receptor blockers (ARBs), which work by relaxing and widening the blood vessels. This helps lower blood pressure and makes it easier for the heart to pump blood around the body. Valsartan is available in tablets, capsules, and liquid form, and is sometimes known by the brand name Diovan[1]. 

What is valsartan used to treat?

Valsartan is prescribed to[1]: 

• Treat high blood pressure (hypertension) 

• Manage heart failure symptoms 

• Support recovery and improve heart function after a heart attack 

It may be used alone or in combination with other medications, such as[1]: 

• Amlodipine (brand: Exforge) 

• Hydrochlorothiazide (brand: Co-Diovan) 

• Sacubitril (brand: Entresto) for chronic heart failure 

How does valsartan work? 

Valsartan blocks the action of a hormone called angiotensin II, which normally causes blood vessels to tighten and narrow. By blocking this hormone, valsartan helps[1]: 

• Relax and widen blood vessels 

• Lower blood pressure 

• Reduce the strain on the heart and improve blood flow 

How does valsartan work?

Valsartan blocks the action of a hormone called angiotensin II, which normally causes blood vessels to tighten and narrow. By blocking this hormone, valsartan helps[1]: 

• Relax and widen blood vessels 

• Lower blood pressure 

• Reduce the strain on the heart and improve blood flow 

Who can take valsartan?

Valsartan is usually suitable for adults and may be prescribed for children under specialist supervision. It may not be suitable for people who[1]: 

• Are allergic to valsartan or similar medicines 

• Have serious heart, liver or kidney problems 

• Have diabetes 

• Have recently had a kidney transplant 

• Have diarrhoea or vomiting (or had either recently) 

• Are on a low-salt diet 

• Are pregnant, trying to get pregnant, or breastfeeding 

• Have low blood pressure or high potassium levels 

Please tell your doctor or pharmacist about any conditions you may have or medication you take before you start treatment, and always follow the instructions in the Patient Information Leaflet[2].  

What is the typical dosage of valsartan?

Valsartan comes in several strengths, including 40mg, 80mg, 160mg, and 320mg tablets. Your dose will depend on your condition[1]: 

• For high blood pressure: 80mg to 320mg once daily 

• For heart failure: 40mg to 160mg twice daily 

• For post-heart attack care: 20mg to 160mg twice daily 

For children[1]: 

• 40mg to 80mg, taken once a day for children weighing 18kg to 34.9kg 

• 80mg to 160mg, taken once a day for children weighing 35kg to 79.9kg 

• 80mg to 320mg, taken once a day for children weighing 80kg and more 

Always follow your prescribed dose and don’t change it without medical advice. 

How do you take valsartan?

Take valsartan once or twice daily, as prescribed. It can be taken with or without food. Swallow the tablets whole with water and try to take it at the same time each day to maintain consistent levels in your body[1]. 

Can you stop taking valsartan?

Do not stop taking valsartan suddenly unless your doctor or pharmacist advises it. Stopping abruptly may cause your blood pressure to rise or your heart failure symptoms to return or worsen[1]. 

What do you do if you take too much valsartan?

Taking too much valsartan can lead to symptoms like dizziness, fainting, or a rapid heartbeat. If this happens, contact your doctor immediately or call NHS 111. In serious cases, go to A&E[1]. 

What do you do if you forget to take valsartan?

Take it as soon as you remember. If it’s almost time for your next dose, skip the missed one. Do not take two doses at the same time to make up for a missed dose[1].  

How do you store valsartan?

Store valsartan in a cool, dry place, away from heat and moisture. Keep it out of reach of children and don’t use it after the expiry date shown on the packaging[1]. 

What medicines can’t you take with valsartan?

Some medicines can interact with valsartan and affect how well it works or increase the risk of side effects. Speak to your doctor or pharmacist if you also take[1]: 

• Other blood pressure medicine (e.g. ramipril, lisinopril, captopril, enalapril, aliskiren) 

• Potassium supplements or potassium-rich salt substitutes (like Lo-Salt) 

• NSAIDs such as aspirin and ibuprofen, which can affect kidney function 

• Diuretics (water tablets), which may raise potassium levels 

• Heparin, for blood clots 

• Spironolactone for heart failure 

• Lithium, due to risk of toxicity 

Always inform your doctor or pharmacist about all medications and supplements you take before you start a new medicine, and follow the instructions in the Patient Information Leaflet[2]. 

What are the side effects of valsartan?

Most people tolerate valsartan well, but some side effects may occur. Common side effects include[1]: 

• Dizziness or light-headedness 

• Headache 

• Tiredness or fatigue 

• Stomach pain or diarrhoea 

• Joint pain or muscle pain 

• Vomiting or nausea 

Serious but rare side effects include[1]: 

• Kidney or liver problems 

• High potassium levels (which may cause muscle weakness or irregular heartbeat) 

• Thrombocytopaenia (low platelets) 

You should contact your GP if you experience any of these symptoms. In rare cases, the medicine may cause a serious allergic reaction (anaphylaxis). You should call 999 or visit A&E immediately if you believe this is happening[1]. 

Symptoms of anaphylaxis include[1]:  

• Difficulty breathing  

• Tightness in throat and chest  

• Swelling of the tongue or throat  

• Feeling faint or dizzy  

• Blue/grey skin or lips  

• Loss of consciousness 

If you experience any side effects, including those not listed, you are encouraged to report them via the Yellow Card Scheme or contact your doctor, pharmacist, or nurse. This information is intended as a summary for general awareness and does not replace professional medical advice. 

The information provided in the side effects section is not a comprehensive list of all possible side effects associated with this medication. For a complete list of side effects, please refer to the Patient Information Leaflet (PIL) provided with your medication or consult your healthcare professional[2]. 

Frequently asked questions about valsartan

Can I take valsartan with food? 
Yes, it can be taken with or without meals[1]. 

Can I drink alcohol while taking valsartan? 
Alcohol should be limited, as it can enhance dizziness or lower your blood pressure too much[1]. 

Is valsartan safe during pregnancy? 
No, it is not recommended during pregnancy. Speak to your doctor or pharmacist about alternative treatments[1]. 

Can children take valsartan? 
Yes, but only under specialist guidance[1]. 

What if I feel dizzy after taking valsartan? 
Sit or lie down and rest. Dizziness usually improves with time but speak to your doctor if it continues[1]. 

Can I drive while taking valsartan? 
Yes, unless you feel dizzy or lightheaded[1]. 

What should I do if I miss a dose? 
Take it when you remember, unless it’s nearly time for your next dose[1]. 

Can I stop taking valsartan if I feel fine? 
No, keep taking it as prescribed. It helps prevent long-term complications, even if you feel well[1]. 

For the official NHS guide to valsartan, visit their website.