Stage 3b CKD Treatment: Medications, Diet, Lifestyle, and Kidney Care

Finding out that you have stage 3b chronic kidney disease (CKD) can raise many questions. What does stage 3b mean? Can kidney function be protected? What medications might be recommended? Should your diet change?

Understanding stage 3b CKD treatment can help you have more productive conversations with your healthcare team and make informed decisions about your kidney health.

Stage 3b CKD generally means an estimated glomerular filtration rate (eGFR) between 30 and 44 mL/min/1.73 m². Treatment at this stage focuses on identifying the cause of CKD, slowing further kidney damage, controlling complications, protecting cardiovascular health, and maintaining overall quality of life.

There is no single treatment plan that works for everyone with stage 3b CKD. Your treatment depends on your eGFR, urine albumin level, blood pressure, diabetes status, medications, laboratory results, age, and other health conditions.

Medical disclaimer: This article is for educational purposes only and does not provide individualized medical advice. Do not start, stop, or change prescription medicines or supplements based on this article. Work with your healthcare professional for a treatment plan appropriate for you.

What Is Stage 3b CKD?

Chronic kidney disease occurs when the kidneys have persistent abnormalities that affect their structure or function.

CKD is classified into different stages according to eGFR. Stage 3b corresponds to an eGFR of approximately 30–44 mL/min/1.73 m².

At this stage, kidney function is moderately to severely reduced, but stage 3b does not mean that a person is automatically approaching dialysis.

Doctors also consider urine albumin, particularly the urine albumin-to-creatinine ratio (uACR), because albuminuria provides additional information about kidney damage and risk.

The cause of CKD also matters. Diabetes, high blood pressure, autoimmune kidney disease, inherited kidney disorders, previous kidney injury, and other conditions can lead to CKD.

Therefore, effective stage 3b CKD treatment starts with understanding the individual patient’s situation.

Main Goals of Stage 3b CKD Treatment

Treatment generally has several goals:

• Slow the progression of kidney disease
• Control blood pressure
• Manage diabetes when applicable
• Reduce excessive albuminuria when appropriate
• Protect cardiovascular health
• Treat anemia and other CKD complications
• Maintain good nutritional status
• Avoid medications that may harm the kidneys
• Monitor kidney function over time

NIDDK recommends controlling blood pressure, meeting appropriate blood glucose goals, taking medicines as prescribed, working with a kidney-trained dietitian, staying physically active, maintaining a healthy weight, getting adequate sleep, and avoiding tobacco as important components of CKD management.

1. Control High Blood Pressure

Blood pressure control is one of the most important parts of stage 3b CKD treatment.

High blood pressure can damage kidney blood vessels and accelerate kidney function decline. At the same time, CKD can make blood pressure more difficult to control.

Your healthcare professional will determine an appropriate blood pressure target based on your overall health.

Treatment may include:

• Prescription blood-pressure medication
• Reducing excessive sodium intake
• Regular physical activity
• Maintaining an appropriate weight
• Limiting tobacco exposure
• Monitoring blood pressure at home when recommended

NIDDK states that controlling blood pressure can help slow or prevent worsening kidney disease.

Home Blood Pressure Monitoring

If your healthcare professional recommends checking your blood pressure at home, an upper-arm blood pressure monitor can be a useful tool for recording readings.

Use the monitor according to its instructions and keep a record of readings if your healthcare team asks you to do so.

A home reading should not be used by itself to change prescription medication.

2. ACE Inhibitors and ARBs

Some people with CKD, particularly those with albuminuria and high blood pressure, may be prescribed medications that block the renin-angiotensin system.

Two important medication classes are:

• ACE inhibitors
• Angiotensin receptor blockers (ARBs)

These medicines can lower blood pressure and reduce albuminuria in appropriate patients.

KDIGO recommends ACE inhibitors or ARBs as first-line blood-pressure treatment when albuminuria is present in specified CKD populations. The guideline also recommends monitoring blood pressure, serum creatinine, and potassium after starting or increasing these medicines.

These medications are prescription treatments. Never stop an ACE inhibitor or ARB simply because a website suggests doing so.

3. SGLT2 Inhibitors for Appropriate Patients

Sodium-glucose cotransporter-2 (SGLT2) inhibitors have become an important part of kidney-protective treatment for certain people with CKD.

Although these medicines were originally developed to treat type 2 diabetes, evidence has shown kidney and cardiovascular benefits in specific CKD populations.

KDIGO 2024 includes recommendations for SGLT2 inhibitor treatment in adults with CKD who meet specified criteria. For people with type 2 diabetes and CKD, an eGFR of at least 20 mL/min/1.73 m² is one criterion in the guideline’s recommendation.

Whether an SGLT2 inhibitor is appropriate depends on factors such as:

• Diabetes status
• eGFR
• Albuminuria
• Heart failure
• Cardiovascular disease
• Current medications
• Other medical conditions

Your healthcare professional should determine whether this type of medication is appropriate for you.

4. Manage Diabetes When Applicable

Diabetes is one of the most common causes of CKD in adults.

If you have diabetes and stage 3b CKD, managing blood glucose is an important component of your overall treatment plan.

Your healthcare team may monitor:

• Blood glucose
• A1C
• Kidney function
• Urine albumin
• Blood pressure
• Cholesterol

Diabetes treatment may need to change as kidney function changes because some medications are processed differently when kidney function declines.

NIDDK recommends working with your healthcare team to meet individualized blood glucose goals and monitor kidney health.

5. Follow an Individualized Kidney-Friendly Diet

Nutrition is another major component of stage 3b CKD treatment.

However, there is no universal CKD diet.

Your nutritional needs depend on laboratory results, medications, diabetes status, blood pressure, body size, nutritional status, and other medical conditions.

A kidney diet may involve adjustments to:

• Sodium
• Protein
• Potassium
• Phosphorus
• Calories
• Fluids

NIDDK recommends working with a dietitian who understands kidney disease to develop an individualized meal plan.

Sodium

Reducing excessive sodium can help with blood-pressure management and fluid balance.

Many processed foods contain significant amounts of sodium, including:

• Processed meats
• Packaged soups
• Instant noodles
• Fast food
• Salty snacks
• Processed sauces
• Some frozen meals

Reading nutrition labels and cooking more meals at home can make sodium management easier.

Protein

People with CKD should not automatically eliminate protein.

Protein is essential for maintaining muscle and overall nutrition. However, excessive protein intake may not be appropriate for some people with CKD.

NIDDK notes that adequate rather than excessive protein intake may be appropriate for many people with CKD, while individualized dietary management is important.

A kidney dietitian can help determine an appropriate protein intake for your specific situation.

Kidney-Friendly Meal Planning Resource

Planning meals can become difficult when you need to pay attention to sodium, protein, potassium, phosphorus, and portion sizes.

A kidney-friendly or low-sodium cookbook can provide ideas for preparing meals at home.

Browse low-sodium and kidney-friendly cookbooks on Amazon

Remember that a recipe described as “kidney-friendly” is not automatically suitable for every person with stage 3b CKD. Your dietary restrictions should be based on your own laboratory results and recommendations from your healthcare professional or renal dietitian.

6. Monitor Kidney Function Regularly

Stage 3b CKD requires ongoing monitoring.

Your healthcare professional may periodically check:

• eGFR
• Serum creatinine
• Urine albumin-to-creatinine ratio
• Potassium
• Sodium
• Bicarbonate
• Hemoglobin
• Calcium
• Phosphorus
• Blood glucose
• Cholesterol

The frequency of testing depends on your individual risk and clinical situation.

NIDDK notes that trends in eGFR and urine albumin-to-creatinine ratio can be used to monitor CKD and assess response to interventions.

A single eGFR measurement does not tell the entire story. Your healthcare team will usually look at changes over time.

7. Treat Anemia and Other CKD Complications

As CKD progresses, some people develop complications such as anemia, mineral and bone disorders, electrolyte abnormalities, metabolic acidosis, and cardiovascular problems.

Anemia can cause symptoms such as:

• Fatigue
• Weakness
• Reduced energy
• Shortness of breath
• Difficulty concentrating

If anemia is present, your healthcare professional may evaluate hemoglobin, iron status, vitamin levels, and other possible causes.

Treatment depends on the underlying cause.

Other CKD complications should similarly be identified through laboratory testing and clinical evaluation.

8. Review Medications for Kidney Safety

Medication safety is particularly important when kidney function is reduced.

Some medicines may require dose adjustments as eGFR declines.

Certain over-the-counter pain medicines, particularly NSAIDs, can be harmful to the kidneys in some circumstances.

NIDDK advises people with CKD to be cautious about medicines and to work with healthcare professionals to protect kidney function.

Before taking a new prescription medicine, over-the-counter medicine, herbal product, or supplement, ask your healthcare professional or pharmacist whether it is appropriate for your kidney function.

9. Maintain a Healthy Lifestyle

Lifestyle changes can complement medical treatment.

Depending on your health status, your healthcare team may recommend:

Physical activity

Regular appropriate physical activity can support cardiovascular health, mobility, and overall well-being.

Healthy weight management

If weight management is appropriate for you, gradual lifestyle changes may help improve cardiovascular and metabolic health.

Avoid tobacco

Smoking can damage blood vessels and increase cardiovascular risk.

Get adequate sleep

Good sleep supports overall health and can complement other lifestyle measures.

Manage stress

Relaxation techniques, social support, hobbies, and other healthy stress-management strategies can be useful.

NIDDK includes physical activity, healthy weight, sleep, tobacco cessation, and stress management among important components of CKD management.

10. Can Stage 3b CKD Be Reversed?

In most cases, established chronic kidney damage cannot simply be reversed.

However, treatment can sometimes slow progression and manage complications.

The outlook depends on:

• The underlying cause
• eGFR trend
• Albuminuria
• Blood pressure
• Diabetes control
• Cardiovascular health
• Medication adherence
• Other medical conditions

A diagnosis of stage 3b CKD does not automatically mean dialysis is needed.

The goal is to identify risk factors and complications early and manage them appropriately.

When Should You See a Kidney Specialist?

Some people with stage 3b CKD may benefit from consultation with a nephrologist, particularly when kidney function is declining, albuminuria is significant, the cause is uncertain, or complications are difficult to manage.

NIDDK notes that because CKD management can be complex, referral to an appropriate healthcare professional, including a nephrologist, may be beneficial.

Ask your primary healthcare professional whether a nephrology consultation would be appropriate for your situation.

A CKD Support Resource

Managing stage 3b CKD can involve many daily decisions involving food, blood pressure, medications, exercise, laboratory testing, and lifestyle.

Educational resources may help you learn about kidney health and prepare questions for your healthcare team.

Learn More About CKD Support

👉 Explore this CKD support program and learn more about kidney-health and lifestyle strategies

Disclosure: This is an affiliate link. CKD Online may receive a commission if you make a purchase through this link, at no additional cost to you.

This resource is intended for educational purposes and should not replace medical care, prescription treatment, or advice from a qualified healthcare professional.

Frequently Asked Questions About Stage 3b CKD Treatment

What is the main treatment for stage 3b CKD?

There is no single treatment. Management may include blood-pressure control, appropriate kidney-protective medications, diabetes management, individualized nutrition, lifestyle changes, and monitoring for CKD complications.

Can stage 3b CKD get better?

Some temporary reductions in kidney function can improve when the underlying cause is treated. However, established chronic kidney damage generally cannot simply be reversed. Treatment focuses on protecting remaining kidney function and reducing complications.

Is stage 3b CKD serious?

Stage 3b represents a significant reduction in kidney filtration. However, the outlook varies substantially between individuals. eGFR trends, albuminuria, the cause of CKD, and other health conditions all matter.

Should I follow a low-protein diet?

Do not drastically restrict protein without professional guidance. People with CKD need adequate nutrition, and protein requirements should be individualized.

Can diet alone treat stage 3b CKD?

Diet is an important component of CKD management, but it is not a substitute for medical treatment. Blood-pressure management, appropriate medications, diabetes management when applicable, and regular monitoring may also be necessary.

Should I take supplements for stage 3b CKD?

Do not assume that a supplement is safe simply because it is marketed as “natural” or “kidney support.” Some supplements can interact with medications or contain ingredients that may be unsuitable for people with reduced kidney function.

Discuss supplements with your healthcare professional before using them.

Final Thoughts

Stage 3b CKD treatment is focused on protecting remaining kidney function, reducing cardiovascular and kidney-related risks, and managing complications.

Important components may include controlling blood pressure, managing diabetes when applicable, using appropriate kidney-protective medications, monitoring urine albumin and eGFR, following an individualized kidney-friendly diet, staying physically active, avoiding tobacco, and reviewing medications for kidney safety.

ACE inhibitors, ARBs, and SGLT2 inhibitors can play important roles for selected patients, but these are prescription therapies that require individualized medical evaluation and monitoring.

Nutrition is equally individualized. Rather than following a restrictive diet found online, work with a healthcare professional or renal dietitian to determine appropriate sodium, protein, potassium, phosphorus, and fluid intake.

Most importantly, stage 3b CKD is not a reason to give up. Regular monitoring and appropriate management can help you understand your kidney health and address problems early.

Use reliable educational information to prepare questions, but make treatment decisions together with your healthcare team.