Health condition · Clinically reviewed
Restless legs syndrome, the urge to move — treatable with iron and modern medications.
An urge to move the legs at rest, relieved by movement, worse at night. Iron is central; dopamine agonists carry augmentation risk; gabapentinoids are now preferred first-line.
Why trust this guide
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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 NICE, IRLSSG and peer-reviewed sources you can see at the end.
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Current for 2026
Reflects the modern shift to alpha-2-delta ligands as first-line, and awareness of dopamine-agonist augmentation.
Key facts
Restless legs syndrome at a glance.
The essentials, in plain English — how RLS is defined, why iron matters, and how modern treatment has moved beyond dopamine agonists.
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What it is
A neurological urge to move the legs at rest — meeting the URGE criteria: Urge, Rest, Gets better with movement, Evening/night worsening.
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Iron is central
Ferritin under 75 μg/L is a key driver — iron replacement often reduces symptoms significantly.
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Modern first-line
Alpha-2-delta ligands (gabapentin, pregabalin) are now preferred first-line over dopamine agonists.
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Augmentation warning
Dopamine agonists (pramipexole, ropinirole) can cause augmentation — symptoms starting earlier and spreading.
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Secondary causes
Rule out renal failure, pregnancy and medication triggers (SSRIs, antihistamines) before long-term treatment.
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Sleep impact
Sleep disruption is the major daily consequence — treatment aims to restore sleep as much as it does to quiet the legs.
Why this guide matters
The old first-line drug isn’t the new first-line drug.
RLS treatment has shifted — iron and gabapentinoids sit above dopamine agonists for most adults. The three points below shape everything else on this page.
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Iron first, always
A ferritin under 75 μg/L is treatable and can transform symptoms before any long-term drug is needed.
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Gabapentinoids over dopamine agonists
Modern first-line for most adults — fewer long-term augmentation problems.
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Augmentation is real, and treatable
Recognising it early — worsening earlier, spreading to arms — protects you from a downward drug spiral.
How the diagnosis is made
From restless nights to a clear plan.
The steps a UK GP will normally follow, in order — so you know what to expect and why.
Phase 1 · Recognising
URGE criteria, ferritin and kidney checks
Phase 2 · Confirming
Pregnancy, diary and medication review
Phase 3 · Managing
Specialist referral where needed
- 01
Recognising
URGE symptom history
Urge to move, worse at Rest, Gets better with movement, worse in the Evening/night — all four criteria met.
- 02
Recognising
Ferritin and iron studies
Serum ferritin, transferrin saturation and full iron panel — target ferritin above 75 μg/L.
- 03
Recognising
Kidney function
Chronic kidney disease is a common secondary cause of RLS — check U&E and eGFR.
- 04
Confirming
Pregnancy consideration
RLS is common in pregnancy, particularly the third trimester. Most cases resolve after delivery.
- 05
Confirming
Sleep diary
Two weeks of bedtimes, awakenings and leg symptoms — clarifies severity and treatment response.
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Confirming
Medication review
SSRIs, tricyclics, sedating antihistamines, dopamine antagonists and some antiemetics can trigger or worsen RLS.
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Managing
Neurology or sleep referral
Refractory, atypical or augmentation-affected cases benefit from specialist review.
Typical timeline: 4-8 weeks from first review to a settled plan.
Symptoms
What restless legs actually feels like.
The classic URGE pattern, plus the triggers and contexts that most often bring RLS to the surface.
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Urge to move the legs
A deep, hard-to-describe urge — worse at rest and in the evening.
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Worse in the evening
Symptoms follow a clear circadian pattern, peaking at night.
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Relieved by movement
Walking, stretching or shifting the legs settles it — briefly.
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Sleep disruption
Trouble falling asleep and repeated awakenings — the most common daily cost.
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Pregnancy-triggered
Often in the third trimester; usually settles after delivery.
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Family history
Primary RLS is often familial — ask about parents and siblings.
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Post-medication
New or worse RLS after starting an SSRI, antihistamine or antiemetic — review the drug first.
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When to escalate
Neurological signs beyond the RLS pattern — weakness, numbness or gait change — warrant a neurology work-up.
Treatment
How RLS is treated in the UK.
Iron first, gabapentinoids second, dopamine agonists with caution — what each option does and where it belongs in the plan.
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Iron replacement (oral)
If ferritin is under 75 μg/L, oral iron (often alternate-day) is a foundational first step and can transform symptoms.
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IV iron
For severe deficiency, poor oral absorption or intolerance — arranged via primary care or specialist depending on regimen.
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Alpha-2-delta ligand
Gabapentin or pregabalin — the modern first-line drug class. Fewer augmentation issues than dopamine agonists.
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Dopamine agonist
Pramipexole or ropinirole are effective but carry a real risk of augmentation — symptoms worsening over time. Used with caution and monitoring.
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Rotigotine patch
Transdermal dopamine agonist — smoother 24-hour levels may reduce (but do not eliminate) augmentation risk.
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Low-dose opioid
For refractory, severe RLS — specialist-led only, with careful monitoring for dependency.
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Address triggering drugs
Where clinically safe, stop or swap SSRIs, sedating antihistamines and dopamine antagonists that worsen RLS.
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Sleep hygiene and pacing
Consistent wake times, moderate evening exercise, reduced caffeine and alcohol — supportive, not standalone.
What this guide is based on
The sources behind every claim on this page.
UK national guidance and international 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 knows your history and can tell you which parts apply to you. If in doubt, ask about ferritin and about the first-line drug class.
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NICE. Restless legs syndrome (Clinical Knowledge Summary).
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International Restless Legs Syndrome Study Group (IRLSSG). Diagnostic criteria and management guidelines.
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European Restless Legs Syndrome Study Group (EURLSSG). Treatment recommendations.
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American Academy of Sleep Medicine (AASM). Practice guideline for the treatment of RLS.
Red flags
When restless legs points to something else.
Most RLS is treatable at home. These are the situations where you should look further, or seek help today.
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Augmentation on a dopamine agonist
Symptoms starting earlier in the day, spreading to arms or becoming more severe — urgent medication review.
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Iron overload / haemochromatosis
Do not iron-load without confirming ferritin and transferrin saturation — overload is harmful.
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Renal failure with RLS
RLS in advanced CKD or dialysis needs a joint renal and neurology plan.
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Severe RLS in pregnancy
Discuss with obstetrics — most drugs are avoided; iron review is a key first step.
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Focal neurological signs
Weakness, sensory loss or gait change — refer for neurology assessment to exclude other diagnoses.
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New RLS with fever
A new, rapid onset with systemic illness — see a GP or NHS 111 promptly.
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Post-stroke RLS
New RLS after a stroke needs specialist review — treatment interacts with other neurological care.
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Recurrent sleep-related injury
Falling or hurting yourself during sleep-onset movements — urgent review and safety planning.
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Suicidal ideation from sleep loss
Severe, chronic sleep loss can precipitate crisis — contact your GP, Samaritans 116 123, or NHS 111.
Living with it
A stubborn condition, but a very treatable one.
Four things that make the biggest difference day to day — iron, evenings, medication awareness and known triggers.
A quiet reminder
Consistency beats intensity, every time.
Small, steady changes — kept up for weeks — do more than any single heroic intervention.
- 01 Iron
Get your ferritin checked
Even a “normal” ferritin can be too low for RLS. Ask for the actual number and aim above 75 μg/L.
- 02 Evenings
Plan the evening
Long sedentary evenings make symptoms worse. Break sitting with short walks, and time medication for the evening peak.
- 03 Medication
Watch for augmentation
If you’re on a dopamine agonist and symptoms creep earlier or spread, don’t just add more — review with your prescriber.
- 04 Triggers
Know your triggers
Alcohol, caffeine, some antihistamines and SSRIs can worsen RLS. Small swaps often make a real difference.
Frequently asked
Everything we get asked about restless legs syndrome.
Quick answers on the URGE criteria, iron, gabapentinoids and augmentation.
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What are the URGE criteria?
A clinical diagnostic framework: an Urge to move the legs, worse at Rest, Gets better with movement, and worse in the Evening or night. All four must be present for a diagnosis of RLS.
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Why does iron matter so much?
Low brain iron affects dopamine signalling in RLS. Even when blood counts look normal, ferritin below 75 μg/L is enough to drive symptoms — and correcting it often helps significantly.
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Are gabapentin or pregabalin really first-line now?
Yes — modern IRLSSG and European guidance favour alpha-2-delta ligands as first-line for most adults, largely because dopamine agonists carry a real augmentation risk over time.
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What is augmentation?
A paradoxical worsening of RLS on dopamine agonists — symptoms start earlier in the day, become more intense and can spread to the arms. Recognising it early is essential.
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Will pregnancy-related RLS go away?
Most pregnancy RLS improves within a few weeks of delivery. Iron studies during pregnancy are still worth doing, as ferritin is often low.
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When should I see a specialist?
If symptoms are severe, refractory to first-line treatment, augmentation is developing, or if there are neurological signs beyond the classic RLS pattern.
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