Can I Take Ibuprofen With Blood Pressure Medicine?

A woman in her sixties came to the counter with a bad knee and a box of ibuprofen she had already picked up from the shelf. "I take my blood pressure tablet and my water tablet every morning," she said. "The knee is keeping me awake. Can I take these together, or is that dangerous?" This scene is a composite of several conversations, and the answer she needed was to check first, not to stop caring about her knee.

Ibuprofen is not automatically off limits with blood pressure medicine, but it needs checking first. The combination of ibuprofen with certain blood pressure medicines, especially ACE inhibitors or angiotensin receptor blockers (ARBs), together with water tablets (diuretics), is linked with a higher risk of kidney injury. Please speak to your pharmacist before taking ibuprofen with any of these, and do not start, stop or change your blood pressure tablets to make room for a painkiller.

What the study found

A large study published in the BMJ in 2013 used UK general practice records for more than 487,000 people taking blood pressure medicines. It looked at what happened when a nonsteroidal anti-inflammatory drug (NSAID) such as ibuprofen was added. Taking an NSAID with just one of these medicines (a diuretic, an ACE inhibitor or an ARB) was not linked with more acute kidney injury. Triple therapy, meaning a diuretic plus an ACE inhibitor or ARB plus an NSAID, was linked with a 31% higher rate (rate ratio 1.31, 95% confidence interval 1.12 to 1.53). The risk was highest in the first 30 days of using the three together, at about 82% higher. The BMJ press release added that the absolute risk for an individual is low, and the authors suggested that a different pain reliever or anti-inflammatory may be a more appropriate choice in some cases.

Two points matter here. The increase was seen with the three together, not with an NSAID plus a single blood pressure medicine, and the individual risk is small for most people. That does not mean it is zero, and it is more important if your kidneys are already under strain.

What the labels say

The US prescribing information for prescription ibuprofen tablets warns about the same pattern. It says NSAIDs may reduce the blood pressure effect of ACE inhibitors, and that ibuprofen can reduce the fluid-removing effect of diuretics such as furosemide and thiazides in some patients, so people on both should be watched closely for signs of kidney failure. The kidney warning names the people at greatest risk: those with impaired kidney function, heart failure or liver dysfunction, those taking diuretics and ACE inhibitors, and the elderly. The label's heart failure warning also says ibuprofen may blunt the effects of medicines such as diuretics, ACE inhibitors and ARBs.

The boxed warning covers two more serious risks. NSAIDs increase the risk of heart attack and stroke, and of serious bleeding, ulceration and perforation in the stomach or intestines, which can happen without warning symptoms.

The NHS medicine page for ibuprofen says the risk of serious side effects is higher with a high dose or long-term use, and lists a problem with the kidneys as a possible serious side effect. Its symptoms include shortness of breath, blood in your pee, and swelling in your ankles, feet or hands. It also says that medicines to lower blood pressure may not mix well with ibuprofen. The NHS lisinopril page, which covers an ACE inhibitor, lists painkillers such as ibuprofen as medicines that may not mix well with it, and says you will have blood tests to check your kidneys.

Sick days and dehydration

Dehydration changes the picture. The NHS acute kidney injury page lists dehydration among the causes of kidney injury, alongside NSAIDs, diuretics and ACE inhibitors. If you are vomiting, have diarrhea, or cannot keep fluids down, your kidneys are under more strain. Scotland's NHS medicine sick day guidance for patients names ACE inhibitors, ARBs, diuretics and NSAIDs among the medicines that may need a short pause during this kind of illness, but only the ones you have agreed in advance with your healthcare professional. So ask your prescriber ahead of time what to do with your water tablet and blood pressure tablets on a sick day. Do not pause either one without that advice, because stopping blood pressure medicine can also cause problems.

Who should be most careful

Take extra care if any of these apply to you:

• you take an ACE inhibitor, an ARB or a water tablet
• you are older
• you have kidney disease, heart failure or liver problems
• you are dehydrated, for example from vomiting or diarrhea
• you need ibuprofen at a high dose or for a long time

The NHS ibuprofen page lists a heart, liver or kidney condition as a reason it may not suit you, and advises speaking to a pharmacist or doctor if you are not sure. Please do not rely on this article to make that call for you.

Ibuprofen also turns up in products you might not think of. Some combination cold, flu and period pain remedies contain it alongside other ingredients, so check the active ingredients on the box before you add anything to your routine. Telling your pharmacist about every product you use, including the ones from the shelf, is the single most useful habit here.

Safer options to discuss

Pain relief is important, and there are usually options to consider with your pharmacist or doctor. Paracetamol, also called acetaminophen, is often used in place of ibuprofen. The NHS paracetamol page says not to take more than eight 500 mg tablets in 24 hours, and to leave at least four hours between doses. In the US, follow the directions on your pack or from your pharmacist, because the limits printed on different products vary. The NHS page also says paracetamol may not suit people who are dependent on alcohol or who binge drink, or who have a kidney or liver condition, and that people who weigh less than 50 kg (about 110 pounds) may need a lower dose. Check the labels of cold and flu remedies, because many contain paracetamol too, and doubling up can exceed the limit.

Your pharmacist can also talk through non-drug steps, such as physiotherapy, heat or a gentle exercise plan for the knee. Those choices depend on your condition, so ask rather than guess.

If your prescriber agrees that an NSAID is the right option for you, the usual safety steps are the lowest effective dose for the shortest time, which both the US label and the NHS advise, and no mixing with other NSAID painkillers such as naproxen or aspirin without advice. If you notice the kidney warning signs listed below, get medical advice promptly.

Questions to ask your doctor or pharmacist

• Is ibuprofen safe for me, given my blood pressure tablets and water tablet?
• Would paracetamol be a better choice, and what dose is right for me?
• Do my kidneys need a blood test before I use any painkiller that is not paracetamol?
• Are there other medicines in my cupboard, including cold remedies, that contain pain relievers?
• If I need an NSAID for my knee, how long should I use it, and what should I watch for?
• Should a prescriber review my blood pressure medicines if I need regular pain relief?

Frequently asked questions

Can I take ibuprofen with my blood pressure tablet just once?

The study followed people using these medicines over time, and I could not find data on single doses. So ask your pharmacist before taking ibuprofen, even once, especially if you also take a water tablet or have kidney, heart or liver problems.

Is paracetamol safe with my blood pressure medicine?

Paracetamol is often used instead of ibuprofen for pain. It still has a daily limit, and your pharmacist can check the total dose if you use other products that contain it.

Does this apply to other painkillers like naproxen?

Naproxen and other NSAIDs belong to the same class as ibuprofen, so the same cautions are worth raising with your pharmacist.

Do I need blood tests?

Your prescriber may check your kidney function, particularly if you take an ACE inhibitor or water tablet. The NHS lisinopril page says that kidney blood tests are used to check for kidney problems.

For more plain-English guides to using everyday medicines safely, browse our Medicines & Safety articles.

Sources

• Lapi F, Azoulay L, Yin H, Nessim SJ, Suissa S. Concurrent use of diuretics, angiotensin converting enzyme inhibitors, and angiotensin receptor blockers with non-steroidal anti-inflammatory drugs and risk of acute kidney injury: nested case-control study. BMJ. 2013;346:e8525.
• EurekAlert! (BMJ Group press release, 8 January 2013). Triple mix of blood pressure drugs and painkillers linked to kidney problems
• DailyMed. Ibuprofen tablets 400 mg, 600 mg and 800 mg (Dr. Reddy's) prescribing information, revised 07/2024
• NHS. Ibuprofen for adults
• NHS. Paracetamol for adults
• NHS. Lisinopril
• NHS. Acute kidney injury (AKI)
• Healthcare Improvement Scotland and Scottish Government. NHS medicine sick day guidance for patients (version 4, 2026)