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Health condition · Clinically reviewed

Systemic lupus (SLE), multisystem autoimmune disease — hydroxychloroquine and modern biologics.

A chronic multisystem autoimmune disease. Hydroxychloroquine is foundational for almost every patient; belimumab and anifrolumab have transformed severe disease.

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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

    Every claim is checked against BSR, EULAR/ACR or peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects current UK guidance on hydroxychloroquine, biologics and lupus nephritis care.

Key facts

Systemic lupus at a glance.

The essentials, in plain English — what SLE is, how it is diagnosed, and how it is treated in the UK today.

  • Definition

    A chronic multisystem autoimmune disease in which the immune system attacks the skin, joints, kidneys, blood, heart, lungs and nervous system.

  • Women 9:1

    Affects women around nine times more often than men, typically presenting between 15 and 45 years of age.

  • ANA, anti-dsDNA, C3/C4

    A positive ANA with anti-dsDNA antibodies and low complement (C3/C4) is the classic serological pattern.

  • Organ involvement

    Renal, cardiac and central nervous system involvement carry the worst prognosis and drive treatment intensity.

  • Hydroxychloroquine

    Hydroxychloroquine is foundational for nearly every patient — it reduces flares, organ damage and mortality.

  • Modern biologics

    Belimumab and anifrolumab have transformed refractory disease and are now used earlier in the treatment pathway.

Why this guide matters

Early recognition protects organs.

Kidney, brain and heart involvement drive long-term outcomes — catching them early and treating aggressively changes the trajectory of the disease.

  • Hydroxychloroquine for everyone

    Foundational for almost every patient — it reduces flares, organ damage and mortality across the board.

  • Biologics change the picture

    Belimumab and anifrolumab give real options for moderate-to-severe disease that used to rely on high-dose steroids.

  • Whole-person care

    Alongside immune treatment, blood pressure, cholesterol, bone health and mental health all deserve active management.

How the diagnosis is made

From first symptom to a clear plan.

The steps a UK GP and rheumatology team will normally follow, in order — so you know what to expect and why.

  1. 01

    Recognising

    EULAR/ACR 2019 classification criteria

    A structured scoring system anchored on a positive ANA, weighing clinical and immunological domains to classify SLE.

  2. 02

    Recognising

    Bloods (ANA, ENA, anti-dsDNA, C3/C4)

    Autoantibody panel and complement levels — a positive ANA is the entry criterion, and anti-dsDNA with low C3/C4 is highly suggestive.

  3. 03

    Recognising

    Urine ACR and microscopy

    Urinary albumin-to-creatinine ratio and microscopy screen for lupus nephritis — proteinuria and active sediment need urgent action.

  4. 04

    Confirming

    Skin biopsy if photosensitive rash

    A punch biopsy of a suspicious rash confirms cutaneous lupus and helps distinguish subtypes.

  5. 05

    Confirming

    Renal biopsy for lupus nephritis

    The single most important investigation when nephritis is suspected — it classifies the lesion and guides immunosuppression.

  6. 06

    Baseline

    Rheumatology consultation

    Specialist review confirms the diagnosis, plans induction and maintenance therapy, and coordinates multidisciplinary care.

  7. 07

    Baseline

    Cardiovascular risk optimisation

    SLE accelerates atherosclerosis — blood pressure, lipids, smoking and weight need active management from diagnosis.

Typical timeline: 4–8 weeks from first rheumatology appointment to a confirmed treatment plan.

Symptoms

What systemic lupus actually feels like.

Lupus is a great mimic — the pattern of skin, joint, kidney and blood involvement is often more telling than any single symptom.

  • Malar rash

    The classic butterfly rash across the cheeks and nose bridge, sparing the nasolabial folds, often triggered by sun exposure.

  • Joint pain and stiffness

    Symmetric small-joint arthralgia and morning stiffness — usually non-erosive, unlike rheumatoid arthritis.

  • Photosensitivity

    Rashes and systemic flares triggered by sunlight or UV exposure — daily broad-spectrum sunscreen is essential.

  • Mouth ulcers

    Painless oral or nasopharyngeal ulcers, often on the hard palate — a subtle but classic feature.

  • Renal involvement

    Proteinuria, haematuria, hypertension or rising creatinine — lupus nephritis can be silent and drives long-term prognosis.

  • Serositis

    Pleuritic chest pain or pericardial pain — inflammation of the lining of the lungs or heart.

  • Haematological (cytopenias)

    Autoimmune anaemia, leucopenia, lymphopenia or thrombocytopenia — often the earliest laboratory clue.

  • Red flag

    Neuropsychiatric lupus, renal crisis or antiphospholipid thrombosis — urgent same-day assessment. Call 999 or attend A&E.

Treatment

How systemic lupus is treated in the UK.

A layered approach: hydroxychloroquine for almost everyone, steroid tapers for flares, immunosuppressants for major organ involvement, and biologics for refractory disease.

  • Hydroxychloroquine (foundational)

    Recommended for nearly every patient with SLE — reduces flares, organ damage and mortality, with annual retinal screening.

  • Corticosteroid taper

    Prednisolone controls flares quickly, but the aim is the lowest effective dose and rapid tapering to protect against long-term harm.

  • Mycophenolate mofetil

    A first-line immunosuppressant for lupus nephritis induction and maintenance, and for severe extra-renal disease.

  • Azathioprine

    A steroid-sparing agent used for moderate disease and in pregnancy, where mycophenolate is contraindicated.

  • Methotrexate

    Useful for persistent joint and skin disease when hydroxychloroquine alone is insufficient.

  • Belimumab

    A monoclonal antibody targeting BAFF — approved for active autoantibody-positive SLE and now also for lupus nephritis.

  • Anifrolumab

    A type I interferon receptor antagonist for moderate-to-severe SLE not controlled by standard therapy.

  • Rituximab (specific cases)

    Used off-label for refractory disease, severe cytopenias or refractory lupus nephritis under specialist supervision.

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 rheumatology team knows your history and can tell you which parts apply to you. If in doubt, get seen.

  • British Society for Rheumatology. Guideline for the management of systemic lupus erythematosus (SLE).

  • EULAR/ACR 2019. Classification criteria for systemic lupus erythematosus.

  • Lupus UK. Patient information and support.

  • NICE. Guidance on belimumab and anifrolumab for systemic lupus erythematosus.

Red flags

When systemic lupus becomes an emergency.

SLE is usually a chronic disease, but these situations need same-day medical attention.

  • Lupus nephritis

    New proteinuria, haematuria, hypertension or rising creatinine — urgent rheumatology and nephrology assessment, usually with renal biopsy.

  • CNS lupus

    New seizures, psychosis, confusion, stroke-like symptoms or severe headache — attend A&E the same day.

  • Antiphospholipid syndrome thrombosis

    Sudden calf swelling, breathlessness, chest pain or focal neurology in a patient with positive antiphospholipid antibodies — urgent assessment.

  • Post-partum flare

    SLE can flare in the weeks after delivery — low threshold for early rheumatology review.

  • Pregnancy planning

    Anti-Ro (SS-A) and anti-La (SS-B) antibody status must be checked — they carry a risk of neonatal lupus and congenital heart block.

  • Serious infection on immunosuppression

    Fever, cough or new symptoms on mycophenolate, rituximab or high-dose steroids — contact your team urgently.

  • Steroid osteoporosis

    Long-term steroids weaken bone — bone protection with calcium, vitamin D and bisphosphonates is often needed.

  • Accelerated atherosclerosis

    Chronic inflammation raises heart attack and stroke risk — chest pain or sudden breathlessness needs same-day assessment.

  • Anti-Ro maternal fetal heart block risk

    Anti-Ro-positive pregnancies need fetal echo monitoring for congenital heart block from around 16 weeks.

Living with it

A long-term condition, but a very manageable one.

Four things that make the biggest difference day to day — sun protection, a flare plan, nutrition, and regular reviews.

A quiet reminder

Consistency beats intensity, every time.

Small, steady changes — kept up for months — do more than a heroic week that does not last.

  1. 01 Sun protection

    UV is a trigger

    Daily broad-spectrum SPF 50, hats and long sleeves reduce flares of both skin and systemic disease.

  2. 02 Flares

    Have a plan

    Know your early flare symptoms and when to contact your team — early treatment prevents organ damage.

  3. 03 Nutrition

    Mediterranean pattern

    A Mediterranean-style diet, weight management and vitamin D support bone, heart and immune health.

  4. 04 Reviews

    Regular reviews matter

    Scheduled bloods, urine and blood pressure checks catch nephritis and cytopenias before symptoms appear.

Frequently asked

Everything we get asked about systemic lupus.

Quick answers on diagnosis, ANA and anti-dsDNA, hydroxychloroquine, biologics, lupus nephritis and pregnancy planning.

  • What is systemic lupus erythematosus?

    Systemic lupus erythematosus (SLE) is a chronic multisystem autoimmune disease in which the immune system attacks the body’s own tissues — most commonly the skin, joints, kidneys, blood, heart and nervous system.

  • How is lupus diagnosed?

    By combining clinical features with the EULAR/ACR 2019 classification criteria, autoantibody testing (ANA, anti-dsDNA, ENA), complement levels (C3/C4), urine testing and, when needed, skin or renal biopsy.

  • Why is hydroxychloroquine so important?

    Hydroxychloroquine reduces flares, protects against organ damage, improves survival and lowers cardiovascular and thrombotic risk. It is recommended for nearly every patient with SLE unless contraindicated.

  • What are belimumab and anifrolumab?

    Both are targeted biologic therapies. Belimumab blocks the B-cell survival factor BAFF, while anifrolumab blocks the type I interferon receptor. They are used for moderate-to-severe SLE that is not controlled by standard treatment.

  • What is lupus nephritis?

    Lupus nephritis is inflammation of the kidneys caused by SLE. It is one of the most important complications because it can be silent and cause long-term kidney damage — regular urine tests and blood pressure checks are essential.

  • Can I get pregnant with lupus?

    Yes, but pregnancy needs planning. Disease should be quiet for at least six months, medications reviewed for pregnancy safety, and anti-Ro (SS-A) and anti-La (SS-B) antibody status checked because of the risk of neonatal lupus and congenital heart block.

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