Low Dose Naltrexone (LDN)

A personalised approach to Low Dose Naltrexone

Prescribed online and delivered to your door

Low Dose Naltrexone — commonly known as LDN — is naltrexone prescribed at much lower doses than the conventional 50mg strength.

LDN is increasingly discussed in relation to a number of chronic pain, fatigue, inflammatory and immune-related conditions.

What is Low Dose Naltrexone?

Naltrexone has been used medically for decades.

At conventional doses, it is an opioid-receptor antagonist used in the treatment of alcohol and opioid dependence.

Low Dose Naltrexone is different.

LDN describes the use of naltrexone at a fraction of the conventional 50mg dose, commonly in the region of 0.5mg to 4.5mg, although the appropriate dose is determined individually by a prescriber.

At these lower doses, researchers have investigated whether naltrexone may have effects relevant to pain signalling, endorphin activity, neuroinflammation and immune regulation.

LDN is now being investigated and prescribed privately for a range of conditions.

However, it’s important to understand that these uses are generally off-label, and the amount and quality of clinical evidence varies significantly between conditions.

LDN should therefore only be used following an appropriate medical assessment.

Why start LDN gradually?

There isn’t necessarily one perfect LDN dose for everyone.

Some people are prescribed a lower starting dose before gradually increasing their dose according to their individual treatment plan.

That’s why we’ve created our LDN Starter Packs.

Rather than supplying only 4.5mg capsules from day one, our packs contain several strengths:

  • 1mg
  • 2mg
  • 3mg
  • 4.5mg

This gives the independent prescriber the ability to recommend a gradual treatment plan where clinically appropriate.

You should always follow the dosing instructions provided with your prescription rather than changing your dose yourself.

Conditions for which LDN is being explored

Research and clinical interest in Low Dose Naltrexone covers a growing range of chronic conditions.
These include:

Fibromyalgia

LDN has been studied as a potential treatment for symptoms associated with fibromyalgia, particularly chronic widespread pain.

Small clinical trials and more recent systematic reviews have produced encouraging findings, although larger high-quality trials are still needed.

Long COVID

Long COVID can involve persistent fatigue, cognitive problems, pain, sleep disturbance and other symptoms following COVID-19 infection.

LDN has attracted research interest as a potential treatment for some people with Long COVID, but evidence remains emerging and it is not an established or licensed treatment for Long COVID.

ME/CFS – Chronic Fatigue Syndrome

Myalgic Encephalomyelitis/Chronic Fatigue Syndrome can involve profound fatigue, post-exertional malaise, sleep disturbance, cognitive difficulties and pain.

LDN is sometimes prescribed off-label for people with ME/CFS, but clinical evidence remains limited and it should not be presented as a proven treatment.

Mast Cell Activation Syndrome – MCAS

Mast Cell Activation Syndrome is associated with inappropriate activation of mast cells and release of chemical mediators.

There is clinical interest in the potential role of LDN in patients with MCAS and related disorders. However, evidence is currently limited and LDN is not licensed specifically to treat MCAS.

Inflammatory Bowel Disease – IBD

Inflammatory Bowel Disease includes Crohn’s disease and ulcerative colitis.

LDN should not replace established IBD treatment and anyone considering it should remain under appropriate medical/specialist care.

Small studies have investigated naltrexone at low doses in Crohn’s disease and other inflammatory bowel conditions.

Hashimoto’s Disease

Hashimoto’s thyroiditis is an autoimmune condition affecting the thyroid.

LDN is sometimes discussed as an adjunctive off-label treatment in autoimmune thyroid disease, but evidence for clinical benefit is limited.

It does not replace thyroid hormone replacement such as levothyroxine where that treatment is required.

Other conditions

The fact that LDN has been researched, discussed or prescribed for a condition does not mean that it is proven to treat that condition or that it will be suitable for you.

Our independent prescriber will assess your medical history, current treatment and reason for requesting LDN before deciding whether prescribing is appropriate.

  • Multiple sclerosis
  • Chronic pain
  • Neuropathic pain
  • Autoimmune conditions
  • Ulcerative colitis
  • Psoriasis
  • Psoriasis

HOW IT WORKS

Getting LDN through RemiVida

We’ve designed the process to be straightforward.

2. Complete your assessment

Tell us about:
Your condition, your symptoms, your medical history, current medication, previous treatments, allergies, use of painkillers or opioids & other relevant health information.

3. Independent clinical review

Your information is reviewed by an appropriately qualified independent UK prescriber.

They decide whether LDN is clinically appropriate.

They may ask for additional information before making their decision.

4. Prescription

If approved, a private prescription is issued.

Buying the service does not guarantee that a prescription will be issued.

5. Specialist pharmacy dispensing

Your prescription is sent to our specialist UK pharmacy partner, Roseway Labs.

Your medication is prepared and dispensed in accordance with the prescription.

6. Discreet delivery

Your LDN is delivered directly to the address you provide.

7. Follow your prescribed plan

Take your medication exactly as instructed by your prescriber and pharmacy.

Don’t increase, decrease or otherwise alter your dose unless advised to do so.

WHY REMIVIDA?

Remivida Logo White on transparent
  • LDN without the complicated process

Accessing Low Dose Naltrexone privately can involve finding a clinician familiar with LDN, obtaining a prescription and then locating a specialist pharmacy capable of preparing low-dose strengths.

We’ve brought those stages together.

  • One straightforward price

Your package includes:

  • LDN medication
  • Independent prescriber review
  • Medical assessment
  • Private prescription if approved
  • Specialist pharmacy dispensing

You simply pay £5 P&P for delivery.

  • Multiple strengths

Instead of immediately providing only one LDN strength, our Starter Packs contain:

  • 1mg
  • 2mg
  • 3mg
  • 4.5mg

allowing a clinician-directed gradual approach where appropriate.

  • Specialist UK pharmacy

Prescription medication is dispensed by our specialist pharmacy partner Roseway Labs.

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  • No subscription

There is no requirement to sign up to an ongoing monthly subscription.

Purchases are made online using our secure shop

  • Private and discreet

We understand that healthcare is personal.

Your assessment is completed privately online and medication is delivered discreetly.

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HOW DOES LDN WORK?

Naltrexone blocks opioid receptors.

At conventional doses, this receptor-blocking action is used clinically in alcohol and opioid dependence.

At much lower doses, researchers have proposed several mechanisms that could potentially explain the effects reported with LDN.

These include:

Temporary opioid receptor blockade

Brief receptor blockade may be followed by changes in endogenous opioid activity — the body’s own endorphin system.

Neuroinflammatory signalling

Research has investigated whether naltrexone may influence inflammatory signalling involving microglial cells in the nervous system.

Immune modulation

LDN has also been investigated for potential effects on immune and inflammatory pathways.

These mechanisms remain areas of ongoing research.

It is therefore more accurate to say that LDN may influence these pathways than to claim that it definitively “resets the immune system”.

Off Label Prescribing

Is Low Dose Naltrexone licensed in the UK?

Naltrexone is an established prescription medicine.

However, using specially prepared low doses for conditions such as fibromyalgia, Long COVID, ME/CFS, MCAS, IBD or Hashimoto’s generally represents off-label prescribing.

Off-label prescribing is lawful in the UK when an appropriately qualified prescriber determines that it is clinically appropriate.

It does mean that LDN hasn’t gone through the same regulatory approval process for each of these specific uses as a medicine specifically licensed for that condition.

Your prescriber therefore considers your individual circumstances before deciding whether treatment is appropriate.

Important Safety Information

LDN and opioid medication

This is particularly important.

Naltrexone blocks opioid receptors and can interact significantly with opioid medicines.
You must tell the prescriber about all medication you currently use, including occasional painkillers.


This includes prescription, over-the-counter and non-prescribed medicines.
Examples of opioid-containing medicines can include products containing:

  • codeine
  • dihydrocodeine
  • tramadol
  • morphine
  • oxycodone
  • fentanyl
  • buprenorphine
  • methadone
  • and others

Some cough and pain medicines may also contain opioid ingredients.

Do not stop prescribed opioid treatment in order to start LDN without appropriate medical advice.

Your prescriber will determine whether LDN is appropriate and whether sufficient time has passed since any opioid use.

Side Effects

Does Low Dose Naltrexone cause side effects?

Like any medicine, naltrexone can cause side effects.

Experiences with LDN vary.

Reported effects can include:

  • vivid dreams
  • sleep disturbance
  • headache
  • nausea or gastrointestinal symptoms
  • fatigue
  • dizziness

Not everyone experiences side effects.

Some people may require slower dose progression or a different dose, but dose changes should be discussed with the clinician rather than made simply from information on this website.

Seek medical advice if you experience concerning or persistent symptoms.

Seek urgent medical attention for symptoms suggesting a serious reaction.

Low Dose Naltrexone – LDN FAQ

Browse the most common questions asked of us about low dose Naltrexone

Ready to find out whether Low Dose Naltrexone could be suitable for you?

Complete our confidential online health assessment.

Your answers will be reviewed by an independent UK prescriber.

If LDN is considered clinically appropriate, your prescription will be sent to our specialist UK pharmacy partner for preparation and dispensing.

IMPORTANT INFORMATION

Low Dose Naltrexone for the conditions described on this website involves off-label prescribing. The available scientific evidence varies by condition and LDN is not guaranteed to improve symptoms.

RemiVida Limited provides the digital platform, administration and patient interface. RemiVida is not a pharmacy and does not itself prescribe or dispense prescription medicines.

Prescribing decisions are made independently by an appropriately qualified prescriber following assessment of the information supplied by the patient.

Prescription medicines are dispensed by an appropriately regulated UK pharmacy. Where the RemiVida pathway uses Roseway Labs, pharmacy services are provided by Galenic Laboratories Limited trading as Roseway Labs.

Never stop or alter existing prescribed medication in order to take LDN without speaking to an appropriate healthcare professional.
If you develop severe or rapidly worsening symptoms, seek urgent medical assistance rather than relying on an online service.

£99 + p&p

LDN Starter Pack

Complete our confidential online medical assessment and your information will be reviewed by an independent UK prescriber.

If LDN is considered clinically appropriate, your prescription is sent to our specialist UK pharmacy partner, where your medication is prepared in the prescribed strengths and delivered discreetly to your home.

90 capsules

20 × 1mg
20 × 2mg
20 × 3mg
30 × 4.5mg

Includes:

  • Online medical assessment
  • Independent UK prescriber review
  • Four LDN strengths
  • Specialist pharmacy preparation and dispensing
  • Discreet UK delivery
  • No subscription
  • Private prescription if approved
£119 + p&p

LDN Enhanced Starter Pack

Complete our confidential online medical assessment and your information will be reviewed by an independent UK prescriber.

If LDN is considered clinically appropriate, your prescription is sent to our specialist UK pharmacy partner, where your medication is prepared in the prescribed strengths and delivered discreetly to your home.

120 capsules

20 × 1mg
20 × 2mg
20 × 3mg
30 × 4.5mg

Includes:

  • Online medical assessment
  • Independent UK prescriber review
  • Four LDN strengths
  • Specialist pharmacy preparation and dispensing
  • Discreet UK delivery
  • No subscription
  • Private prescription if approved