If you have been diagnosed with stage 3b chronic kidney disease (CKD), understanding medications for stage 3b CKD can help you have more productive conversations with your healthcare team.

Stage 3b CKD generally means an estimated glomerular filtration rate (eGFR) of 30–44 mL/min/1.73 m². At this stage, the kidneys have a significant reduction in filtering capacity, so medication selection and monitoring become especially important.

There is no single medication that treats every person with stage 3b CKD. Treatment depends on the cause of kidney disease, blood pressure, urine albumin levels, diabetes, cardiovascular risk, potassium levels, other medical conditions, and the medications a person already takes.

The main goals are to slow kidney disease progression, control blood pressure and other risk factors, reduce complications, and protect overall health.

Medical disclaimer: This article is for general educational purposes only and does not replace medical advice. Never start, stop, or change a prescription medicine because of information in an online article. People with CKD should discuss medications, supplements, and over-the-counter products with a qualified healthcare professional.

What Is Stage 3b CKD?

CKD is a long-term condition in which kidney damage or reduced kidney function persists for at least three months.

Stage 3b corresponds to an eGFR of approximately 30–44. However, eGFR is only one part of kidney assessment.

Doctors may also monitor:

• Urine albumin-to-creatinine ratio (UACR)
• Blood pressure
• Serum creatinine
• Potassium
• Bicarbonate
• Hemoglobin
• Calcium
• Phosphorus
• Blood glucose
• Cholesterol

UACR is particularly important because albumin in the urine can provide information about kidney damage and progression risk.

Medication decisions should therefore be based on the complete clinical picture rather than eGFR alone.

Why Are Medications Important in Stage 3b CKD?

As kidney function decreases, the body may process and eliminate some medicines differently.

This means that a medicine that was appropriate when kidney function was higher may eventually require a dose adjustment or a different treatment approach.

NIDDK recommends that people with CKD review prescription medicines, over-the-counter medicines, vitamins, and supplements with their healthcare team.

Some medications are used specifically to protect kidney function, while others are used to manage conditions that contribute to CKD progression or its complications.

1. ACE Inhibitors and ARBs

Two important medication classes used in CKD are:

• Angiotensin-converting enzyme (ACE) inhibitors
• Angiotensin II receptor blockers (ARBs)

These medicines affect the renin-angiotensin system and can lower blood pressure and reduce albumin loss through the kidneys.

Examples of ACE inhibitors include medicines with generic names ending in “-pril.” Examples of ARBs generally end in “-sartan.”

NIDDK notes that ACE inhibitors and ARBs may slow kidney disease progression and delay kidney failure in appropriate patients.

KDIGO 2024 recommends renin-angiotensin system inhibitors for specific people with CKD and albuminuria, with treatment individualized according to the person’s circumstances.

Why Monitoring Matters

ACE inhibitors and ARBs can affect serum creatinine and potassium.

KDIGO recommends checking blood pressure, serum creatinine, and serum potassium after starting or increasing the dose of a renin-angiotensin system inhibitor, generally within 2–4 weeks, depending on kidney function and potassium levels.

This is one reason these medicines should be managed by a healthcare professional.

2. SGLT2 Inhibitors

Sodium-glucose cotransporter-2 (SGLT2) inhibitors were initially developed primarily for diabetes treatment, but research has demonstrated kidney and cardiovascular benefits in appropriate people with CKD.

KDIGO 2024 recommends SGLT2 inhibitors for certain adults with CKD, including adults with an eGFR of at least 20 mL/min/1.73 m² and urine ACR of at least 200 mg/g, as well as adults with heart failure regardless of albuminuria. KDIGO also suggests their use for some adults with eGFR 20–45 and lower albuminuria.

Because stage 3b CKD falls within the eGFR range where these medicines may be considered, some patients may discuss an SGLT2 inhibitor with their healthcare professional.

However, eligibility depends on the individual’s medical history and laboratory results.

KDIGO also notes that SGLT2 inhibitors may cause an initial reversible decrease in eGFR that is generally not, by itself, a reason to discontinue treatment.

3. Blood Pressure Medications

High blood pressure is one of the most important factors associated with CKD progression.

Some people with stage 3b CKD need more than one blood pressure medication to reach their individualized treatment target.

Depending on the patient’s circumstances, treatment may include:

• ACE inhibitors
• ARBs
• Calcium channel blockers
• Diuretics
• Other antihypertensive medicines

NIDDK identifies blood pressure control as a major component of CKD management.

The exact combination should be determined by a healthcare professional.

Home Blood Pressure Monitoring

If your healthcare professional recommends monitoring blood pressure at home, an upper-arm blood pressure monitor can help you record measurements between appointments.

For example:

A home monitor does not treat CKD, but it can help you keep track of a risk factor that is important in kidney disease management.

When using one, follow the manufacturer’s instructions and ask your healthcare team how often you should measure your blood pressure.

4. Diuretics

Diuretics, sometimes called water pills, help the body remove sodium and water.

They may be prescribed when a person has high blood pressure, swelling, or fluid retention.

NIDDK notes that some people with CKD may need a diuretic as part of blood pressure treatment.

The appropriate diuretic and dose depend on kidney function, blood pressure, fluid status, and other medications.

Because diuretics can affect electrolytes and fluid balance, they require appropriate monitoring.

5. Cholesterol-Lowering Medications

People with CKD can have increased cardiovascular risk.

For some adults with CKD, healthcare professionals may recommend statin-based treatment or other lipid-lowering therapies depending on age, cardiovascular risk, cholesterol levels, and medical history.

KDIGO’s CKD guidance includes lipid management and statin therapy as part of comprehensive cardiovascular risk reduction.

These medicines are not used to directly increase eGFR. Instead, they can be part of a broader strategy to reduce cardiovascular risk.

6. Diabetes Medications

Diabetes is a major cause of CKD.

If a person with stage 3b CKD also has diabetes, glucose-lowering treatment may need to be reviewed as kidney function changes.

Potential treatment approaches may include:

• Metformin when appropriate
• SGLT2 inhibitors
• GLP-1 receptor agonists in appropriate patients
• Other glucose-lowering medications

The correct treatment depends on kidney function, glucose levels, cardiovascular risk, other medications, and individual circumstances.

KDIGO emphasizes comprehensive diabetes and CKD management that combines lifestyle measures with appropriate pharmacologic therapy.

7. Medications for CKD Complications

Stage 3b CKD can be associated with complications such as anemia, electrolyte abnormalities, metabolic acidosis, and mineral and bone disorders.

Treatment is based on laboratory findings and the underlying cause.

For example, a person with CKD-related anemia may need evaluation of hemoglobin, iron status, and other possible causes before treatment is selected.

Similarly, abnormal potassium, bicarbonate, calcium, or phosphorus levels may require specific management.

The important point is that these medications should not be selected simply because someone has stage 3b CKD. Laboratory results and clinical assessment should guide treatment.

8. Be Careful With NSAID Pain Relievers

One of the most important medication-safety issues for people with CKD involves nonsteroidal anti-inflammatory drugs (NSAIDs).

Common NSAIDs include:

• Ibuprofen
• Naproxen

NIDDK warns that NSAIDs can damage the kidneys and may contribute to acute kidney injury, particularly in people with CKD, diabetes, high blood pressure, or dehydration.

If you have stage 3b CKD and need treatment for pain, fever, or inflammation, ask your healthcare professional or pharmacist which options are appropriate for you.

Do not assume an over-the-counter medication is automatically safe because it does not require a prescription.

9. Review Vitamins and Supplements

People with CKD sometimes take vitamins, minerals, herbal products, or dietary supplements.

However, some supplements may contain ingredients that are inappropriate for people with reduced kidney function.

Your doctor and pharmacist should know about everything you take, including:

• Prescription medications
• Over-the-counter medicines
• Vitamins
• Herbal products
• Dietary supplements
• Sports or nutrition products

NIDDK specifically recommends keeping healthcare professionals informed about all medicines and supplements to reduce the risk of harmful interactions.

Can Supplements Treat Stage 3b CKD?

There is no supplement that should be presented as a proven cure for established stage 3b CKD.

Some nutritional products may be appropriate for particular deficiencies, but supplementation should be based on an identified need and professional advice.

10. Medication Doses May Change as CKD Progresses

One of the key principles of medications for stage 3b CKD is that treatment may need to change over time.

Reduced kidney function can alter how some medicines are eliminated from the body.

Your healthcare professional may therefore:

• Reduce a dose
• Increase the time between doses
• Stop a medicine
• Switch to another medicine
• Increase laboratory monitoring

NIDDK explains that medicines may need to be changed as kidney disease progresses because reduced filtration can cause some medicines to accumulate in the blood.

This is why regular kidney-function testing is important.

11. Keep an Updated Medication List

A simple medication list can make CKD care safer.

Your list should include:

• Medication name
• Dose
• How often you take it
• Reason for taking it
• Vitamins
• Supplements
• Over-the-counter products

Bring the list to medical appointments.

NIDDK recommends keeping an up-to-date medication and supplement list and sharing it with healthcare professionals.

Using one pharmacy or pharmacy chain when possible may also help pharmacists identify potential medication interactions.

12. Medication Management Works Best With Diet and Lifestyle

Medication is only one part of stage 3b CKD care.

NIDDK recommends a broader approach that includes blood pressure control, diabetes management when applicable, appropriate nutrition, physical activity, healthy weight management, adequate sleep, smoking cessation, and stress management.

A lower-sodium eating pattern may also help support blood pressure management.

For people who want additional meal-planning ideas, a low-sodium cookbook can be a useful educational resource.

A cookbook is a meal-planning tool, not a medical treatment for CKD. If you have restrictions involving potassium, phosphorus, protein, or fluid, discuss them with a kidney dietitian.

A CKD Support Resource

Managing stage 3b CKD can involve many different areas, including medications, nutrition, blood pressure, laboratory monitoring, and lifestyle changes.

If you want an additional educational resource about CKD management, you can explore the CKD support program below.

Affiliate disclosure: CKD Online may earn a commission if you purchase through this affiliate link, at no additional cost to you.

Explore the CKD support program:
[CKD support program affiliate link]

This resource should be considered educational support and should not replace care from a doctor, nephrologist, pharmacist, or registered dietitian.

Frequently Asked Questions About Medications for Stage 3b CKD

What medications are commonly used for stage 3b CKD?

Depending on the person’s condition, treatment may include ACE inhibitors or ARBs, SGLT2 inhibitors, blood pressure medications, diuretics, cholesterol-lowering medicines, diabetes medications, and treatments for CKD complications.

Not everyone with stage 3b CKD needs all of these medications.

Can medications slow stage 3b CKD?

Some medications can reduce risk factors associated with CKD progression. ACE inhibitors and ARBs can reduce albuminuria in appropriate patients, while SGLT2 inhibitors are recommended for certain adults with CKD.

Treatment must be individualized.

Should people with stage 3b CKD avoid ibuprofen?

People with CKD should discuss NSAIDs such as ibuprofen and naproxen with a healthcare professional before using them. NIDDK warns that NSAIDs can harm the kidneys and increase the risk of acute kidney injury in susceptible people.

Do CKD medications need monitoring?

Yes. Depending on the medication, healthcare professionals may monitor eGFR, creatinine, potassium, blood pressure, glucose, urine albumin, and other laboratory values.

Can I take supplements with CKD medications?

Do not assume a supplement is safe simply because it is sold without a prescription. Tell your doctor and pharmacist about every supplement you take so potential interactions and kidney-related risks can be assessed.

Final Thoughts

Understanding medications for stage 3b CKD is an important part of long-term kidney care.

Treatment may involve medications that control blood pressure, reduce albuminuria, protect kidney and cardiovascular health, manage diabetes, control cholesterol, reduce fluid retention, or treat complications of CKD.

However, there is no universal medication plan for everyone with stage 3b CKD.

The safest approach is to review your complete medication list with your healthcare team, monitor kidney function and relevant laboratory values, avoid potentially harmful over-the-counter medicines unless approved, and make lifestyle and dietary changes that complement your medical treatment.

A blood pressure monitor or low-sodium cookbook can support day-to-day self-management, while an educational CKD program can provide additional information. These products should complement—not replace—professional kidney care.