How Painkillers Can Damage Your Kidneys - Doctors Issue a Warning

Do Painkillers Really Harm Your Kidneys? Everything You Should Know

Painkillers can feel like a gift during unbearable pain, offering much-needed relief. Every day, millions of people use painkillers to treat their headaches, back pain, menstrual cramps or joint discomfort. However, painkillers may sometimes offer timely relief, but they can silently harm the kidneys. Despite the risks to kidney health, many people still take them without hesitation.

Health experts and doctors suggest that frequent or careless use of these medications can have serious consequences for kidney health. They even warn that painkiller overuse can affect people’s kidneys long before any symptoms appear.

This detailed guide is a must-read for you or your family if they consider painkillers as their go-to medication. It sheds light upon the common types of painkillers, how they can affect kidney function, who is at higher risk, and what you can do to stay safe.

Understanding How Your Kidneys Work

Before understanding how painkillers affect kidneys, let’s understand the role of the kidneys.

Kidneys are mainly responsible for filtering the waste out of the blood, balancing fluids, maintaining blood pressure, and producing hormones that control blood pressure and red blood cell production. They work around the clock without any rest.

However, many painkillers, especially NSAIDs such as ibuprofen, naproxen and diclofenac, affect the way blood flows through the kidneys. They reduce the production of substances called prostaglandins that help keep kidney blood vessels open. When prostaglandin levels drop, blood flow decreases, which, over time, reduces kidney function. This is why health experts usually talk about the painkiller effect on the kidneys.

What are the Different Types of Painkillers and Their Functions?

NSAIDs (Non-steroidal Anti-inflammatory Drugs)

Common examples include Aspirin, Ibuprofen, Naproxen, and Diclofenac. Low-dose aspirin is generally considered safe for kidney function. Non-aspirin NSAIDs (like ibuprofen and diclofenac) pose a higher risk when used frequently or in high doses.

NSAIDs are easily available in the market even without a doctor’s prescription. Many people purchase them frequently to treat several chronic conditions like arthritis or recurrent headaches. Occasional use of these medicines may not be harmful to healthy adults. However, if you take painkillers more than twice or thrice a week, you might be at risk for kidney problems due to painkiller overuse.

NSAIDs work by blocking the COX-1 and COX-2 enzymes that produce prostaglandins, the chemicals that cause pain, fever, etc. Many people are still unaware of common painkiller side effects.

Opioids

Common examples include Codeine, Morphine, and Tramadol.

Most opioids are not directly toxic to the kidneys, but some can cause kidney-related complications, especially in people with reduced kidney function, where drug metabolites can accumulate.  But for people with impaired kidney function, these drugs and their metabolites are removed very slowly, which can lead to accumulation in the blood, and may indirectly increase the side effects of painkillers on kidney performance indirectly. These prescription drugs are used for moderate to severe pain.

Paracetamol (Acetaminophen)    

Paracetamol helps manage pain and fever. It is preferred by many people, and it works by blocking the brain’s perception of pain instead of reducing inflammation. However, it's considered safer for the kidneys than NSAIDs if taken appropriately. But, overdose can lead to serious complications and increase painkiller side effects.  

Do painkillers affect the kidney? Unfortunately, the answer is yes! Some painkillers can be nephrotoxic when used excessively, for long durations, or in high-risk individuals. These medications may sometimes make it difficult for the kidneys to filter waste and other toxins from your bloodstream, increasing the side effects of painkillers on kidney health.

How Painkillers Affect or Damage Your Kidney Function?

Occasional use of painkillers may not pose a major threat to the kidneys. However, painkiller overuse or overdose can cause serious risks to your kidney health.

Reduced Blood Flow to the Kidneys

By blocking the prostaglandins, NSAIDs can decrease the blood flow to the kidneys. When the blood flow is not proper, there may be more pressure on the kidneys to filter the waste, which can cause Acute Kidney Injury (AKI).

High Blood Pressure

An overdose of painkillers can also raise blood pressure in the body. These medicines may make your body hold on to extra salt and water, which can raise your blood pressure. Over time, high blood pressure can damage the kidneys and affect how well they work.

Liver Damage

Overconsumption of paracetamol can affect liver function. In severe cases, liver damage may also indirectly impact kidney function, mainly if the liver is unable to remove toxins from the bloodstream.

Chronic Kidney Disease (CKD)

Taking high-dose painkillers or combining painkillers can damage kidney function.

Who is at Higher Risk?

Painkillers can usually affect anyone, but research suggests that a certain set of people are more likely to experience kidney harm. These include:

• Those with pre-existing kidney diseases
• Individuals with diabetes
• People with high blood pressure
• Older adults

However, if you fall into any of these categories, it is recommended to strictly avoid taking NSAIDs, as even small amounts may not be safe for you.

Can we Prevent Kidney Damage from Painkillers?

Fortunately, yes! You can prevent kidney damage from painkillers by following some common doctor-approved tips:

1. Use painkillers only when needed: Avoid taking painkillers for every mild pain or discomfort. It is recommended to use them only when the pain is severe or unbearable and is prescribed by a health professional. Do not self-medicate frequently.  
2. Avoid combining painkillers: Don’t mix different types of painkillers. Doing so can increase toxicity risks. Moreover, avoid taking medicines with alcohol.
3. Consult your doctor: It is highly recommended. Before even purchasing any type of painkiller, it is always best to consult with your doctor.
4. Monitor kidney function: If you take painkillers frequently, ensure you get kidney function tests done regularly.
5. Choose the lowest effective dose: Higher doses are not always necessary for pain relief. Use the lowest effective dose under medical supervision, especially for chronic pain.
6. Keep yourself well hydrated: Drink plenty of water, as it may help your kidneys function properly.

Wrapping Up!

Painkillers can feel like magic as they make your tough moments easier, but they also come with higher risk. There are numerous medications and supplements available in the market, but many people don’t realise their potential impact on kidney health.

If you are upset about your kidney health, or if you or a family member takes painkillers frequently, it is advisable to consult with your doctor today and check your kidney health.

Disclaimer

This article is intended for general informational and educational purposes only and should not be considered medical advice. The information provided here is not a substitute for professional medical diagnosis, treatment, or consultation. Painkiller use and its effects on kidney health can vary based on individual medical conditions, existing illnesses, age, and other health factors. Always consult a qualified healthcare professional before starting, stopping, or changing any medication, including over-the-counter painkillers. Do not self-medicate, especially if you have diabetes, high blood pressure, pre-existing kidney disease, or are an older adult. If you experience any symptoms of kidney issues or adverse reactions to medications, seek medical care immediately.