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Health condition · Clinically reviewed

Kidney failure, from early CKD to transplant - a clear modern plan.

Kidney failure is not one disease. It is a spectrum, from sudden acute injury to slowly progressive CKD and end-stage disease. Modern therapy is transforming outcomes.

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Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against NICE, KDIGO and the Renal Association standards you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK practice including SGLT2 inhibitors, finerenone, HIF-PH stabilisers and CKD-EPI 2021.

Key facts

Kidney failure at a glance.

The essentials, in plain English - what it means, the types, and how it is treated in the UK today.

  • What it is

    Loss of renal function - either acute (AKI) or chronic (CKD), with end-stage renal failure requiring dialysis or transplant.

  • AKI vs CKD

    AKI is a sudden drop in kidney function over hours to days; CKD is progressive loss over months to years, staged 1 to 5.

  • End-stage disease

    When eGFR falls below 15, renal replacement therapy - haemodialysis, peritoneal dialysis or a transplant - becomes necessary.

  • The big drivers

    Diabetes and hypertension cause most CKD in the UK; glomerulonephritis, polycystic kidney disease and obstruction account for much of the rest.

  • Practice-changing drugs

    SGLT2 inhibitors (dapagliflozin, empagliflozin) and finerenone now slow CKD progression across a wide range of patients.

  • Transplant is the goal

    For suitable patients kidney transplantation offers the best survival and quality of life compared with long-term dialysis.

Why this guide matters

A modern plan, not a slow slide.

Kidney care has changed profoundly in the past five years. The three points below shape everything else on this page.

  • AKI and CKD are different problems

    Acute injury needs urgent reversal of the cause; chronic disease needs a long slow plan to slow progression.

  • SGLT2 inhibitors changed the game

    Dapagliflozin and empagliflozin now slow progression across diabetic and non-diabetic CKD - not just a diabetes drug.

  • Plan for RRT early

    Dialysis, transplant and conservative care are all valid. Deciding in good time makes every route smoother.

How the diagnosis is made

From first blood test to a clear plan.

The steps a UK GP or nephrologist will normally follow, in order - so you know what to expect and why.

  1. 01

    Assessing

    History and medication review

    Diabetes, hypertension, family history, nephrotoxic drugs (NSAIDs, ACE inhibitors, contrast) and any red flags for obstruction or systemic disease.

  2. 02

    Assessing

    Examination and fluid status

    Blood pressure, hydration, oedema, bladder palpation and features of uraemia such as pallor, itch or a pericardial rub.

  3. 03

    Assessing

    Bloods and eGFR (CKD-EPI 2021)

    U&Es, creatinine and eGFR using the 2021 race-free CKD-EPI equation, plus FBC, bicarbonate, calcium, phosphate and PTH.

  4. 04

    Confirming

    Urinalysis and ACR

    Dipstick for blood and protein, and an albumin-creatinine ratio - the strongest predictor of CKD progression alongside eGFR.

  5. 05

    Confirming

    Renal ultrasound

    To assess kidney size, exclude obstruction and hydronephrosis, and look for polycystic disease.

  6. 06

    Planning

    Specialist bloods and biopsy

    Immunology, complement, myeloma screen and, where indicated, a renal biopsy under specialist commissioned nephrology care.

  7. 07

    Planning

    Nephrology MDT and planning

    For advanced CKD the MDT plans for dialysis access, transplant workup or conservative management well before ESRF.

Typical timeline: a first blood test to a settled plan in weeks to months, depending on severity.

Symptoms

What kidney failure actually feels like.

Early CKD is often silent. Symptoms usually appear only in advanced disease - and knowing them helps you act sooner.

  • Oliguria or polyuria

    Reduced urine output in AKI, or increased volumes in early CKD as concentrating ability fails.

  • Uraemic symptoms

    Fatigue, nausea, poor appetite, itch and confusion as urea and toxins accumulate.

  • Fluid overload

    Ankle and leg swelling, breathlessness and pulmonary oedema when the kidneys cannot excrete salt and water.

  • Hyperkalaemia and acidosis

    Rising potassium and metabolic acidosis - both can be life-threatening and need urgent review.

  • Hypertension

    Poorly controlled blood pressure is both a cause and a consequence of kidney failure.

  • Anaemia

    Reduced erythropoietin production drives normocytic anaemia in CKD - often iron deficient too.

  • Bone and mineral disease

    Disordered calcium, phosphate, vitamin D and PTH cause bone pain, fractures and vascular calcification.

  • Red flag - emergency features

    Anuria, refractory hyperkalaemia, severe acidosis, pulmonary oedema or uraemic encephalopathy need same-day hospital care.

Treatment

How kidney failure is treated in the UK.

Blood pressure, SGLT2 inhibitors and finerenone first; anaemia and bone care next; dialysis or transplant for end-stage disease.

  • Treat the underlying cause

    Correct hypovolaemia and sepsis, relieve obstruction and stop nephrotoxic drugs - the cornerstone of AKI management.

  • Blood pressure control

    Target under 130/80 for most, or under 120/80 where tolerated. ACE inhibitors or ARBs are first line in proteinuric CKD.

  • SGLT2 inhibitors

    Dapagliflozin and empagliflozin (DAPA-CKD, EMPA-KIDNEY) slow progression in diabetic and non-diabetic CKD - a practice-changing addition. See our SGLT2 inhibitor clinic.

  • Finerenone (Kerendia)

    Non-steroidal mineralocorticoid receptor antagonist for diabetic CKD (FIDELIO, FIGARO), NICE-approved. See our finerenone clinic.

  • Anaemia management

    Iron replacement first, then erythropoiesis-stimulating agents or HIF-PH stabilisers such as daprodustat - see our daprodustat clinic.

  • Bone and mineral care

    Phosphate binders, activated vitamin D and, where needed, cinacalcet or parathyroidectomy under specialist commissioned care.

  • Dialysis

    Haemodialysis or peritoneal dialysis when ESRF develops - a specialist commissioned service planned well in advance.

  • Kidney transplant

    The gold standard for suitable patients - see our kidney transplant clinic.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or nephrologist knows your history and can tell you which parts apply to you. If in doubt, get seen.

  • NICE. Chronic kidney disease: assessment and management (NG203).

  • NICE. Acute kidney injury: prevention, detection and management (NG148).

  • KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of CKD.

  • Renal Association / UK Kidney Association clinical practice guidelines.

Red flags

When kidney failure needs urgent attention.

Most CKD is managed in primary care with a nephrology safety net. These are the situations that need same-day input.

  • Anuria or rapidly rising creatinine

    Little or no urine output, or a fast rise in creatinine, needs same-day hospital assessment for AKI.

  • Severe hyperkalaemia

    Potassium above 6.5, or any ECG changes, is a medical emergency needing immediate treatment.

  • Pulmonary oedema

    Breathlessness at rest with fluid overload is an emergency - urgent diuresis or dialysis may be needed.

  • Uraemic encephalopathy

    Confusion, drowsiness, seizures or a pericardial rub in advanced kidney failure - urgent nephrology input.

  • Obstruction on ultrasound

    Hydronephrosis or a palpable bladder needs prompt urology review to relieve the block. See our hydronephrosis guide.

  • New nephritic features

    Blood and protein in urine with hypertension and falling function - consider glomerulonephritis and refer urgently.

  • Sepsis with AKI

    Hypovolaemic or septic AKI needs prompt fluid resuscitation, source control and review of nephrotoxic drugs.

  • Contrast or drug exposure

    A recent CT with contrast, NSAID course, ACE inhibitor start or new antibiotic can precipitate AKI - stop and review.

  • Rhabdomyolysis

    Muscle pain, dark urine and a very high creatine kinase after a fall, seizure or intense exercise - needs urgent fluids.

Living with it

A long game, with real levers.

Four things that make the biggest difference over years - knowing your numbers, sick-day rules, lifestyle basics and planning ahead for advanced disease.

A quiet reminder

Small steady changes protect kidneys for decades.

Blood pressure, diabetes control, sensible medicines and staying active outweigh any short-term intervention.

  1. 01 Monitor

    Know your numbers

    Track your eGFR, ACR and blood pressure. Small changes over time matter more than any single reading.

  2. 02 Medicines

    Sick-day rules

    Pause ACE inhibitors, ARBs, SGLT2 inhibitors, diuretics, NSAIDs and metformin when unwell with vomiting or diarrhoea - restart when eating and drinking normally.

  3. 03 Lifestyle

    Blood pressure, weight, salt

    Modest salt reduction, a healthy weight and regular activity protect kidneys as much as they protect the heart.

  4. 04 Plan

    Look ahead

    In advanced CKD, planning for dialysis access, transplant or conservative care in good time makes every option smoother.

Frequently asked

Everything we get asked about kidney failure.

Quick answers on staging, SGLT2 inhibitors, dialysis, transplant and when to see a specialist.

  • What is kidney failure?

    Loss of kidney function - either acute (AKI, developing over hours to days) or chronic (CKD, progressing over months to years). End-stage renal failure means eGFR below 15 and usually needs dialysis or a transplant.

  • How is CKD staged?

    By eGFR and albuminuria. Stages 1 and 2 are early with preserved eGFR but evidence of damage; stage 3a and 3b are moderate reductions; stage 4 is severe (eGFR 15 to 29); stage 5 is ESRF with eGFR below 15.

  • What are SGLT2 inhibitors and why do they matter?

    Dapagliflozin and empagliflozin were originally diabetes drugs, but the DAPA-CKD and EMPA-KIDNEY trials showed they slow CKD progression and reduce cardiovascular events across a wide range of patients, including those without diabetes.

  • Do I always need dialysis in end-stage disease?

    No. For some patients, particularly older or frailer people with significant comorbidity, conservative care with symptom control can offer similar or better quality of life. Transplant, dialysis and conservative care are all valid options.

  • Can kidney function recover?

    AKI often recovers if the cause is treated promptly, though some people are left with residual CKD. Established CKD does not usually reverse, but progression can be slowed substantially with modern therapy.

  • When should I be referred to a nephrologist?

    When eGFR is under 30, when ACR is over 70, when there is rapid decline, uncontrolled hypertension, suspected genetic disease, or unexplained anaemia and bone disease. Earlier referral is better than later.

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