Some common pain relievers can harm the kidneys. The main concern is a group called NSAIDs, such as ibuprofen and naproxen, and the risk is highest at higher doses, with long-term use, and in people whose kidneys are already under strain. If you have kidney disease, check with your doctor or pharmacist before taking any pain reliever, even one sold over the counter.
Key Takeaways
- NSAIDs, including ibuprofen, naproxen and higher-dose aspirin, lower the amount of blood that flows through your kidneys.
- The risk rises with higher doses and long-term use, and for people with kidney disease, heart failure, high blood pressure or dehydration.
- People with chronic kidney disease (CKD) should not treat themselves with NSAIDs and should talk with a healthcare professional first.
- Acetaminophen is generally considered safe for the kidneys at recommended doses, but too much of it can cause serious liver damage.
- NSAIDs hide in many cold and combination products, so read every label and tell each doctor and pharmacist that you have kidney disease.
What Are NSAIDs, and How Do They Affect the Kidneys?
NSAIDs (nonsteroidal anti-inflammatory drugs) reduce pain, fever and inflammation. Common over-the-counter examples are ibuprofen (Advil, Motrin), naproxen (Aleve) and aspirin at higher doses. Prescription NSAIDs include celecoxib (Celebrex) and meloxicam (Mobic).
According to the National Kidney Foundation (NKF), NSAIDs lower the amount of blood that flows through your kidneys. This can cause acute kidney injury (AKI), a sudden drop in kidney function, or make existing CKD worse. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) adds that long-term use can damage the kidneys, and that taking NSAIDs while dehydrated or when your blood pressure is low can cause AKI.
Is Ibuprofen Bad for Your Kidneys?
Ibuprofen is an NSAID, so it carries the same kidney risks as the rest of the group. NKF says the risk is greatest at higher doses and with long-term use. If you do not have CKD, NKF advises using NSAIDs only as the product label recommends, at the lowest dose possible and for the shortest time necessary.
Daily use is a different story. NIDDK warns that regular use of NSAIDs such as ibuprofen and naproxen can damage your kidneys. If you reach for a pain reliever most days, tell your doctor, both to protect your kidneys and to look at what is causing the pain.
Who Is at Higher Risk of Kidney Problems From NSAIDs?
NKF, NIDDK and Cleveland Clinic point to these groups:
- People with CKD, especially those whose eGFR (a measure of kidney filtering) is below 60
- People with diabetes, heart disease, heart failure, high blood pressure or liver disease
- People who take blood pressure medicines such as ACE inhibitors, ARBs or diuretics (water pills)
- Adults 65 or older, who Cleveland Clinic advises should check with a provider first
- Anyone who is dehydrated, for example from vomiting, diarrhea or not drinking enough
These risks can add up. NIDDK explains that when you are sick and dehydrated, the pressure inside your kidneys can drop. Healthy kidneys can usually protect themselves, but certain blood pressure medicines and NSAIDs can each make that harder. That is not a reason to stop your blood pressure medicine; ask your provider ahead of time what to do on sick days. Our guide to CKD stages and treatment explains where your kidney function may stand.
Which Pain Reliever Is Safer if You Have Kidney Disease?
Acetaminophen (Tylenol) is the option often suggested for people with kidney disease. NKF says it is generally safe for your kidneys at recommended doses, though you should still check with your healthcare professional first. It eases pain and fever but does not lower inflammation, so it may not help with pain caused by inflammation.
Acetaminophen has its own limit, and that limit is the liver. The FDA warns that taking too much can cause liver failure and death, and that severe liver damage may occur if you have three or more alcoholic drinks a day while using it. People with liver disease should ask their provider before using it. Follow the label, never take two products that both contain acetaminophen, and ask your doctor what is right for you.
Are Pain Creams and Gels a Safer Choice?
They can be for some people. NKF says topical NSAIDs, which are applied to the skin, can be safe to use with CKD. Diclofenac gel (Voltaren), for example, is rubbed into the joints, and very little of the drug enters your blood, which lowers the risk of kidney damage.
According to NKF, other topical products, such as menthol, capsaicin or lidocaine creams, are not expected to cause kidney problems when used as the label directs. Using more than recommended lets more drug reach your blood. NKF adds that non-drug options like stretching, physical therapy or massage often make pain treatment work better.
Where Do NSAIDs Hide in Everyday Products?
NIDDK points out that if you take medicine for headaches, pain, fever or colds, you may be taking an NSAID without knowing it. Many cold and flu products mix a pain reliever with other ingredients, and NSAIDs are sold under many brand names. NKF advises checking the label for the word “NSAID” and asking a healthcare professional before using these products.
The same goes for acetaminophen, which the FDA says is in hundreds of medicines and may appear on prescription labels as “APAP.” Read the active ingredients on every label so you do not double up by accident.
How Can You Protect Your Kidneys When You Need Pain Relief?
These habits help, especially if you have kidney disease:
- Tell every doctor and pharmacist that you have kidney disease, and ask how a new medicine or supplement may affect your kidneys.
- Keep an up-to-date list of your medicines and supplements, and bring it or your pill bottles to every visit.
- Fill prescriptions at one pharmacy so your pharmacist can check for harmful interactions.
- Before you get sick, ask what you can take for pain or fever, and what to do with your other medicines if you have vomiting or diarrhea.
- Drink fluids to avoid dehydration when you are ill, but ask your care team how much is right for you if you are on a fluid limit.
- Avoid alcohol while taking pain medicines.
Kidney function also affects how your body clears many medicines, so people with CKD may need regular eGFR checks. Our guide to kidney function test results explains what those numbers mean.
When Should You Call a Doctor About Pain Reliever Side Effects?
Call 911 or go to the emergency room if you have chest pain or pressure, trouble breathing, sudden confusion, a seizure, or swelling of the eyes, lips or tongue.
Call your doctor right away if you are peeing much less than usual or not at all, notice new swelling in your legs, ankles or feet, gain weight suddenly, or see black stools or blood in your urine. Make a regular appointment if you need a pain reliever most days, or if you have kidney disease and are not sure which pain relievers are safe for you.
Frequently Asked Questions
Is It Safe to Take Ibuprofen Once in a While?
If you do not have kidney disease, NKF advises using NSAIDs like ibuprofen only as the label directs, at the lowest dose and for the shortest time. If you have CKD, heart failure or another risk factor, ask your doctor first.
Is Tylenol Easier on the Kidneys Than Advil?
Tylenol (acetaminophen) is not an NSAID, and NKF says it is generally safe for the kidneys at recommended doses. Advil (ibuprofen) is an NSAID. Acetaminophen can harm the liver if you take too much, so ask your doctor which is right for you.
Does Low-Dose Aspirin Hurt Your Kidneys?
NKF notes that low-dose aspirin recommended by a provider for heart protection is different from higher-dose aspirin, which acts like an NSAID on the kidneys. If you take aspirin for your heart, do not stop it on your own; ask your doctor.
Should You Stop a Prescribed NSAID if You Have Kidney Disease?
Do not stop or change any prescribed medicine without talking to your doctor first. NKF notes that sometimes an NSAID cannot be avoided because of other health conditions, and then you should follow your healthcare professional’s directions closely.
Can You Drink Alcohol While Taking Pain Relievers?
NKF advises avoiding alcohol when taking pain medicines. The combination can lead to liver damage, especially with acetaminophen, and acute kidney injury, especially with NSAIDs.
Talk to ANC About Pain Relief and Your Kidneys
If you have kidney disease and are unsure which pain relievers are safe for you, bring your full medication list to your next visit and ask. Associated Nephrology Consultants cares for people with all types of acute and chronic kidney disease. Contact ANC or call 651-772-6251 to schedule a visit.
Sources
- National Kidney Foundation: Pain Medicines and Kidney Disease
- NIDDK: Keeping Kidneys Safe: Smart Choices about Medicines
- Cleveland Clinic: NSAIDs (Nonsteroidal Anti-Inflammatory Drugs)
- FDA: Acetaminophen
- National Kidney Foundation: Acute Kidney Injury (AKI)
Medical Disclaimer
This article is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your specific care and treatment options.
