Health condition
Gitelman syndrome
Gitelman syndrome is the commonest inherited kidney tubule disorder - a defect in the thiazide-sensitive transporter causing chronic low potassium and magnesium, salt craving, fatigue and cramps, usually diagnosed in adolescence or adulthood.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
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Signature biochemistry: low potassium, low magnesium, metabolic alkalosis and characteristically low urinary calcium - the calcium finding helps separate it from Bartter
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Symptoms: fatigue, muscle cramps and weakness, salt craving, tetany when magnesium dips, palpitations; some people are diagnosed after routine bloods
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Caused by recessive SLC12A3 variants - like being born on a permanent thiazide diuretic
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QT-interval prolongation risk means an ECG belongs in the assessment, and potassium/magnesium levels matter around illness, alcohol and certain drugs
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Treatment is lifelong replacement - potassium and magnesium supplements, liberal salt - sometimes with amiloride or spironolactone; prognosis is good
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
Gitelman hides in plain sight: a young adult with unexplained cramps and exhaustion whose bloods repeatedly show potassium at 2.8 and magnesium below range, dismissed as diet or stress for years. The faulty transporter sits in the distal tubule, so the salt leak is milder than Bartter's, but magnesium wasting is built in and drives much of the misery - cramps, pins and needles, even tetany - while low urinary calcium quietly signs the diagnosis on a spot urine test.
Diagnosis and treatment routes
Confirmation with SLC12A3 genetic testing has become routine and spares patients repeated provocative testing; family screening finds affected siblings. Management is unglamorous but effective: magnesium first (levels lift potassium with them), potassium supplements or potassium-sparing diuretics, salt to appetite, and an ECG plus medication review to avoid QT-prolonging combinations; pregnancy generally goes well with monitoring. If chronically low potassium and magnesium have never been properly explained, ask about Gitelman - a private renal-endocrine opinion is typically available within about two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant nephrologist or endocrinologist. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Gitelman syndrome.
Quick, plain-English answers to what people ask us most.
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Can you explain what gitelman syndrome is?
Gitelman syndrome refers to a recognised clinical condition that a GP or specialist assesses using your history, examination and, if appropriate, targeted investigations. The way it presents and its impact can vary considerably from person to person.
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What causes gitelman syndrome?
Gitelman syndrome can arise from several different underlying mechanisms, and in many cases more than one factor contributes. Identifying likely causes usually forms part of the initial specialist work-up.
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What does gitelman syndrome look like?
Symptoms of gitelman syndrome vary from person to person and can range from mild and easily missed to significant enough to affect daily life. Because overlapping conditions can produce similar symptoms, a clinical assessment is the most reliable way to confirm what's actually going on.
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Can gitelman syndrome cause complications?
Most cases of gitelman syndrome are manageable with appropriate care, though, like many conditions, it can occasionally lead to complications if left unassessed or untreated. Your clinician can give you a realistic sense of the risks based on your specific presentation.
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Is gitelman syndrome hereditary or genetic?
Many forms of gitelman syndrome have a genetic or inherited component, and some are linked to specific gene changes that can run in families. If there's a family history, genetic counselling can help clarify the pattern of inheritance and whether relatives might benefit from testing.
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Is there a cure for gitelman syndrome?
Gitelman syndrome can often be managed effectively, and in some cases prevented or reversed, with the right combination of lifestyle changes, medication or other targeted treatment. A specialist will tailor the approach to your circumstances rather than applying a one-size-fits-all plan.
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How is gitelman syndrome treated?
Treatment for gitelman syndrome is usually built around the severity of your symptoms and any underlying cause found on assessment, and may involve lifestyle measures, medication, physiotherapy or, in some cases, a procedure. Your specialist will discuss the pros and cons of each option with you before agreeing a plan.
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What's the outlook for gitelman syndrome?
The outlook for gitelman syndrome varies widely depending on the underlying cause, how early it's diagnosed, and how it responds to treatment. Many people see significant improvement with appropriate care, and your specialist can give you a more personalised timeframe once they've reviewed your case.
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Could gitelman syndrome be confused with another condition?
Because several conditions can share similar symptoms to gitelman syndrome, clinicians often consider a short list of possibilities before confirming a diagnosis. This is one of the main reasons a proper assessment, and sometimes targeted tests, matters more than relying on symptoms alone.
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When should I see a doctor about gitelman syndrome, and how quickly can I be seen privately?
It's worth seeking medical advice if symptoms of gitelman syndrome are persistent, worsening, or affecting your daily life, rather than waiting for them to resolve on their own. NHS routine referrals for this kind of assessment can take anywhere from around 20 to 45+ weeks, whereas private consultants typically offer an appointment within about two weeks.