Experiences with
Valsartan

Valsartan is an angiotensin receptor blocker (ARB) medicine widely used to treat high blood pressure (hypertension) and heart failure. It's also sometimes prescribed after a heart attack.

It relaxes and widens your blood vessels. This lowers your blood pressure and makes it easier for your heart to pump blood around your body.

Some people take valsartan in combination with other medicines:

with amlodipine (brand name Exforge) to treat high blood pressure
with hydrochlorothiazide (brand name Co-Diovan) to treat high blood pressure
with sacubitril (brand name Entresto) to treat a type of long-term heart failure

Valsartan is only available on prescription. It comes as tablets, capsules and as a liquid that you swallow.

Who can take valsartan

Most adults aged 18 and over can take valsartan.

Children aged 6 years and over can take valsartan, but only to treat high blood pressure.

Your doctor may prescribe valsartan if you've tried taking blood pressure-lowering medicines called ACE inhibitors, such as ramipril and lisinopril, but had to stop taking them because of side effects such as a dry, irritating cough.

Who may not be able to take valsartan

Valsartan is not suitable for some people. To make sure it's safe for you, tell your doctor if you:

have ever had an allergic reaction to valsartan or other medicine
have heart, liver or kidney problems
have diabetes
have recently had a kidney transplant
have diarrhoea or vomiting (or have recently had this)
are on a low-salt diet
have low blood pressure (hypotension)
are trying to get pregnant, are already pregnant or if you are breastfeeding

Dosage and strength

The dose of valsartan you take depends on why you need the medicine. Take it as your doctor tells you.

The usual dose for adults is:

high blood pressure – 80mg to 320mg, taken once a day
heart failure – 40mg to 160mg, taken twice a day
after a recent heart attack – 20mg to 160mg, taken twice a day

The dose may be lower if you've recently lost body fluids (for example because you've been sick or have diarrhoea).

Child doses

The dose for children depends on their weight. The usual dose for children is:

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

Changes to your dose

After a few weeks, your doctor will check your blood pressure and ask you if you're getting any side effects. You may also have blood tests to check how well your kidneys are working and the amount of potassium in your blood. Your doctor will then decide whether to change your dose of valsartan.

If valsartan does not bring your blood pressure down, your doctor may want to increase the dose. If your blood pressure gets too low or you get side effects, your doctor may want to lower your dose of valsartan.

How to take it

You will usually take valsartan once or twice a day.

If you take it once a day, your doctor may suggest that you take your first dose before bedtime, because it can make you feel dizzy. After the very first dose, you can take valsartan at any time, although it's best to take it at the same time every day.

You can take valsartan tablets, capsules and liquid with or without food.

Swallow the tablets whole with a drink of water.

If you're taking valsartan as a liquid, it will come with a plastic syringe or spoon to help you measure out the right dose. If you do not have one, ask your pharmacist for one. Do not use a kitchen teaspoon as it will not measure the right amount of medicine.

How long to take it for

Usually, treatment with valsartan is long term, even for the rest of your life.

If you stop taking valsartan, your blood pressure could rise, and this can increase your chances of having a heart attack or stroke.

If you're bothered by any side effects, your doctor may be able to prescribe you a different blood pressure-lowering medicine.

Take valsartan even if you feel well, as you will still be getting the benefits of the medicine.

If you get very bad diarrhoea or vomiting for any reason, contact your doctor or a pharmacist. They'll be able to advise you about what to do.

They may recommend that you stop taking valsartan until you're better, and can eat and drink normally again.

If you forget to take it

If you miss a dose of valsartan, take it as soon as you remember, unless it's almost time for your next dose. In this case, skip the missed dose and take your next dose at the usual time.

Do not take 2 doses to make up for a forgotten one.

If you forget doses often, it may help to set an alarm to remind you. You could also ask your pharmacist for advice on other ways to help you remember to take your medicine.

If you take too much

An overdose of valsartan can cause low blood pressure. This can make you feel dizzy, sleepy and give you a pounding heartbeat (palpitations).

The amount of valsartan that can lead to an overdose varies from person to person.

you take more than your prescribed dose of valsartan

Go to 111.nhs.uk or call 111

If you need to go to A&E, do not drive. Ask someone to drive you or call 999 and ask for an ambulance.

Bring the valsartan packet or leaflet inside it, any remaining medicine, and any other medicines you take.

Common side effects

These common side effects of valsartan happen in more than 1 in 100 people. There are things you can do to help cope with them:

If valsartan makes you feel dizzy when you stand up, try getting up very slowly or stay sitting down until you feel better. If you begin to feel dizzy, lie down so that you do not faint, then sit until you feel better. Do not drive, cycle or use tools or machines if you feel dizzy.

Make sure you rest and drink plenty of fluids. Try not to drink too much alcohol. Ask your pharmacist to recommend a painkiller.

Headaches should usually go away after the first week of taking valsartan. Talk to your doctor if they last longer than a week or are severe.

Try taking your tablets with or after a meal or snack. It may also help if you do not eat rich or spicy food.

Drink plenty of fluids, such as water or squash, to prevent dehydration. If you're being sick, take small, frequent sips. Speak to a pharmacist if you have signs of dehydration, such as peeing less than usual or having dark, strong-smelling pee.

If you get very bad vomiting from a stomach bug or illness, tell your doctor. You may need to stop taking valsartan for a while until you feel better.

If you take the combined pill or the progestogen-only pill and you're being sick, your contraception may not protect you from pregnancy. Check the pill packet to find out what to do.

Drink lots of fluids, such as water or squash, to avoid dehydration. Signs of dehydration include peeing less than usual or having dark, strong-smelling pee.

If you get very bad diarrhoea from a stomach bug or illness, tell your doctor. You may need to stop taking valsartan for a while until you feel better. Do not take any other medicines to treat diarrhoea without speaking to a pharmacist or doctor.

If you take the combined pill or the progestogen-only pill and you have severe diarrhoea for more than 24 hours, your contraception may not protect you from pregnancy. Check the pill packet for advice.

If you get unusual muscle pain, weakness or tiredness that is not from exercise or physical work, talk to your doctor. You may need a blood test to check what might be causing it.

If this advice does not help and any of these side effects continue, tell your doctor or pharmacist.

Serious side effects

It happens rarely, but some people have serious side effects after taking valsartan.

Call 111 or call a doctor straight away if:

the whites of your eyes turn yellow, or your skin turns yellow, although this may be less obvious on brown or black skin – this can be a sign of liver problems
you bruise more easily than usual, get reddish-purple spots on the skin, bleed for longer from cuts to the skin, or bleed from your gums or nose – this can be a sign of thrombocytopaenia (low platelet count)
you feel weak, have an irregular heartbeat, pins and needles and muscle cramps – these can be signs of changes in the potassium levels in your blood

Serious allergic reaction

In rare cases, it's possible to have a serious allergic reaction (anaphylaxis) to valsartan.

Meds New IA (H4) - serious allergic reaction

Taking valsartan for a long time can sometimes cause your kidneys not to work as well as they should. Your doctor will check how well your kidneys are working with regular blood tests.

Other side effects

These are not all the side effects of valsartan. For a full list, see the leaflet inside your medicine packet.

Valsartan and pregnancy

Valsartan is not recommended in pregnancy. This is because it can reduce the level of fluid around your baby, particularly if you take it in the second and third trimesters of pregnancy. It can also cause long-term damage to your baby's kidneys and lungs, and other problems.

If you are already pregnant, stop taking valsartan and talk to your doctor straight away. They will usually be able to prescribe a different medicine that's safer to take in pregnancy. Valsartan should always be stopped by the time you're 12 weeks pregnant.

It's important to use contraception if you're taking valsartan and carefully plan any pregnancy with your doctor or specialist. They will review your medical condition and medicine before you get pregnant.

Most women stop taking valsartan before getting pregnant, but you may be able to keep taking it until you have a positive pregnancy test and then stop. Your doctor will discuss what's best for you, based on your medical condition and the risks and benefits of valsartan.

Valsartan and breastfeeding

It might be OK to take valsartan while breastfeeding, but talk to your doctor or pharmacist first. It is best not to take valsartan if your baby was born prematurely, but your doctor will help you decide.

It is not yet known how much valsartan gets into breast milk. There is a very small risk that it could also lower your baby's blood pressure. Until we know more about valsartan in breastfeeding, your doctor may recommend a different medicine for you to take.

Talk to your health visitor, midwife, pharmacist or doctor if:

your baby is not feeding as well as usual
your baby seems unusually sleepy
your baby looks much paler than normal
you have any other concerns about your baby

Valsartan and fertility

There's no clear evidence to suggest that taking valsartan reduces fertility in either men or women.

However, if you're trying to get pregnant, talk to your doctor first as this medicine is not recommended in pregnancy.

Meds New IA (H2) - Pregnancy non-urgent care card

Cautions with other medicines

Some medicines can affect the way valsartan works.

Tell your doctor if you're taking:

other medicines to help lower your blood pressure, including aliskiren, enalapril, captopril, lisinopril or ramipril
painkillers such as ibuprofen, naproxen, diclofenac, celecoxib or etoricoxib
aspirin (if you are taking more than 3g a day)
potassium supplements or salt substitutes that contain potassium
heparin – a medicine that helps prevent blood clots,
diuretics (medicines which make you pee more)
lithium, a medicine for mental health problems
spironolactone, a medicine to treat heart failure

Mixing valsartan with herbal remedies and supplements

There's not enough information to say that herbal remedies and supplements are safe to take with valsartan. They're not tested in the same way as pharmacy and prescription medicines. They're generally not tested for the effect they have on other medicines.

Meds New IA (H2) - Cautions with other medicines alert