Treating kidney disease focuses on slowing its progression and managing the conditions that make it worse, primarily high blood pressure and diabetes. The approach changes depending on how much kidney function you’ve lost, measured by a blood test called eGFR (estimated glomerular filtration rate). A normal eGFR is 90 or above, while an eGFR below 15 indicates kidney failure. Most treatment happens in the stages between those two numbers, where the right combination of medication, diet, and lifestyle changes can preserve your remaining kidney function for years or even decades.
Understanding Your Stage
Kidney disease is divided into five stages based on eGFR, and knowing your stage helps you understand how aggressively you need to act. Stage 1 (eGFR 90+) and Stage 2 (eGFR 60-89) represent early kidney damage where function is still mostly intact. Many people at these stages don’t feel any symptoms at all. Stage 3 is split into 3a (eGFR 45-59) and 3b (eGFR 30-44), where kidney function loss becomes moderate to severe. Stage 4 (eGFR 15-29) is severe loss, and Stage 5 (eGFR below 15) is kidney failure.
At every stage, your doctor will test your urine for a protein called albumin. The combination of your eGFR and your albumin levels gives the clearest picture of how your kidneys are doing and how fast things might progress. Treatment in the early stages centers on controlling the underlying causes. In later stages, the focus shifts toward managing complications like anemia, bone loss, and fluid buildup, while preparing for the possibility of dialysis or transplant.
Blood Pressure Control
High blood pressure is both a cause and a consequence of kidney disease, and controlling it is the single most important thing you can do to protect your kidneys. The 2021 international guidelines for kidney disease recommend targeting a systolic blood pressure of 120 mmHg or lower, which is more aggressive than the standard 140 mmHg target used for the general population. This tighter target has been shown to slow kidney function decline more effectively.
Two classes of blood pressure medications are particularly important because they also directly protect the kidneys by reducing the pressure inside the kidney’s filtering units. These drugs work by blocking hormones that constrict blood vessels in the kidneys, and they’re typically the first medications prescribed when kidney disease is diagnosed. If you have protein in your urine, these medications become even more critical, since protein leakage is a sign of ongoing kidney damage.
Newer Medications That Slow Progression
A class of drugs originally developed for diabetes has become a cornerstone of kidney disease treatment, even for people who don’t have diabetes. These medications, called SGLT2 inhibitors, work by changing how the kidneys filter sugar and salt, which reduces pressure on the kidney’s filtering system. In large clinical trials, they’ve shown significant benefits for both kidney and heart protection. One major trial found a 29% reduction in heart failure hospitalizations with one of these drugs.
Another newer medication targets a hormone called aldosterone, which contributes to inflammation and scarring in the kidneys. In a study simulating treatment across 6.4 million eligible patients, one year of treatment was projected to prevent over 38,000 cardiovascular events, including roughly 14,000 hospitalizations for heart failure. This drug reduced cardiovascular risk by about 14% regardless of how much kidney function a person had at the start. These newer therapies are now recommended alongside traditional blood pressure medications, especially for people who also have diabetes or heart disease.
Dietary Changes by Stage
What you eat matters more as kidney disease progresses, because damaged kidneys can’t filter waste products or balance minerals as efficiently. The two biggest dietary shifts involve protein and minerals like potassium and phosphorus.
If you’re not on dialysis, a lower-protein diet is recommended. Protein produces waste that kidneys must filter, so eating less of it reduces the workload on your remaining kidney function. This flips once you start dialysis: dialysis removes protein from your blood along with waste, so you’ll actually need to increase protein intake at that point to avoid muscle loss and malnutrition.
Potassium is trickier because your kidneys regulate it, and both too much and too little can be dangerous. Foods with 200 mg or more of potassium per serving are considered high-potassium. Common high-potassium foods include bananas, potatoes, tomatoes, and oranges. Lower-potassium alternatives include apples, berries, rice, and pasta. Phosphorus also needs attention in later stages because excess phosphorus pulls calcium from your bones. Processed foods, dark colas, and dairy products tend to be high in phosphorus. A kidney dietitian can help you build a meal plan that accounts for all of these factors without making eating feel impossible.
Exercise and Physical Activity
International guidelines recommend at least 150 minutes per week of moderate-intensity exercise for people with kidney disease. That works out to about 30 minutes on five days a week. Walking briskly, cycling, and swimming all count. The target intensity is roughly 70% of your peak heart rate, which for most people means you can talk but not sing during the activity.
Research has also explored higher-intensity interval training, where you alternate between four-minute bursts at about 90% of your peak heart rate and recovery periods. Both approaches improve cardiovascular fitness, which matters because heart disease is the leading cause of death in people with kidney disease, not kidney failure itself. Resistance training, like light weightlifting or bodyweight exercises, is also beneficial for maintaining muscle mass, which tends to decline as kidney function drops. Starting slowly and building up is fine. Any amount of regular movement is better than none.
Managing Anemia
Healthy kidneys produce a hormone that signals your bone marrow to make red blood cells. As kidney function declines, this hormone drops, and anemia develops. You might notice fatigue, weakness, feeling cold, or shortness of breath with activities that used to be easy.
Treatment involves medications that mimic this hormone, helping your body produce more red blood cells. The general target is a hemoglobin level between 10 and 12 g/dL. Pushing hemoglobin higher than 13 g/dL with these medications actually increases the risk of heart attack, stroke, and heart failure, so the goal isn’t to normalize your blood counts completely but to bring them into a range where symptoms improve without creating new risks. Iron supplements are often needed alongside these medications, since your body needs iron as a raw material for making red blood cells.
When Dialysis Becomes Necessary
Dialysis isn’t triggered by a single number. Guidelines recommend evaluating the need for dialysis when eGFR drops below 15, but the decision depends more on symptoms than on lab values alone. The symptoms that typically prompt dialysis include persistent fatigue, loss of appetite, nausea, sleep disturbances, itching, and difficulty concentrating. These are signs that waste products are building up in your blood faster than your kidneys can clear them.
There are two main types. Hemodialysis filters your blood through a machine, usually three times a week at a dialysis center for about four hours per session, though home hemodialysis is an option for some people. Peritoneal dialysis uses the lining of your abdomen as a natural filter: you fill your abdominal cavity with a special fluid, let it absorb waste for several hours, then drain it. This can be done at home, often overnight while you sleep. Both types keep you alive and functioning, but they replace only about 10-15% of normal kidney function, which is why transplant is considered the better long-term option when possible.
Kidney Transplant
A transplanted kidney from a living or deceased donor can restore near-normal kidney function and free you from dialysis. The median wait time for a deceased donor kidney is about 33 months, though this varies widely. Some people wait just over a year, while others wait five years or more depending on blood type, antibody levels, and geographic region.
A living donor transplant, where a family member, friend, or even an altruistic stranger donates a kidney, typically has better outcomes and avoids the long wait. You can be evaluated and placed on the transplant list before you ever start dialysis, and a preemptive transplant (one done before dialysis begins) generally produces the best results. After transplant, you’ll take anti-rejection medications for the life of the kidney. These suppress your immune system enough to prevent it from attacking the new organ, which means you’ll need to be more careful about infections and stay current with health screenings.
Slowing Progression at Every Stage
Regardless of your stage, a few principles hold true. Keep your blood pressure at or below 120/80. If you have diabetes, tight blood sugar control reduces additional kidney damage. Don’t smoke, since smoking accelerates kidney function loss independently of other risk factors. Avoid over-the-counter anti-inflammatory painkillers like ibuprofen and naproxen, which reduce blood flow to the kidneys and can cause acute damage on top of chronic disease. Acetaminophen is generally the safer choice for pain relief.
Stay consistent with monitoring. In early stages, an eGFR recheck every three months helps establish whether your kidney function is stable or declining. A stable eGFR over time is a realistic and meaningful goal. Kidney disease doesn’t always progress to failure, and many people with stage 2 or 3 disease live full lives without ever needing dialysis, provided they manage the conditions driving the damage.