LDN for Long COVID

Additional information

LDN for long COVID

Still not back to yourself months after COVID? You’re not imagining it, and you’re not alone

Long COVID can leave you fighting fatigue that sleep does not fix, brain fog that makes work hard, breathlessness, and symptoms that flare whenever you push too far. It is real, it is common, and it can be deeply frustrating, especially when tests come back normal. At Courier Pharmacy, we believe healthcare should fit the person, not force the person to fit the system. So we work alongside your GP and any specialist clinic, never instead of them, and where it is right for you, we offer low dose naltrexone, or LDN, as one option some people with long COVID choose to explore. Healthcare that fits you, and your recovery.

Five key takeaways

• Long COVID means symptoms that continue for 12 weeks or more after a COVID-19 infection and are not explained by another cause, as NICE describes.
• It is common and genuine. As the NHS and research describe, it can affect many systems, with fatigue, breathlessness and brain fog among the most reported symptoms.
• Care is supportive and personalised. Pacing, rehabilitation and treating individual symptoms are the mainstays, coordinated through your GP or a long COVID service.
• Low dose naltrexone is an option some explore. The evidence in long COVID is early and limited, and LDN is used off-label here.
• LDN sits alongside your care. It never replaces your GP, specialist or standard rehabilitation, and it is prescriber-assessed for safety.

How Courier Pharmacy helps

• Honest, personalised guidance on living with long COVID and your options
• Low dose naltrexone through a prescriber consultation, where it is appropriate for you
• A clear, evidence-based explanation of what LDN can and cannot do in long COVID
• Compounded LDN prepared to order by APC Labs, our specials partner
• Support that works alongside your GP and long COVID service, never instead of them

Long COVID deserves proper, joined-up care. We complement that care, we do not replace it, and we will always encourage you to stay under your GP or specialist clinic.

What is long COVID?

Long COVID is the everyday name for symptoms that carry on long after a COVID-19 infection. As NICE describes, doctors use the term post-COVID-19 syndrome for symptoms that continue for more than 12 weeks and are not explained by anything else. Ongoing symptoms between 4 and 12 weeks are sometimes called ongoing symptomatic COVID-19.

The key point is that the original infection may have been mild, yet the after-effects can last for months. As the NHS explains, long COVID is not one single thing. It is a collection of symptoms that vary from person to person and can come and go over time.

Importantly, long COVID is genuine. Many people spend months being told their tests are normal and feeling dismissed. Normal blood tests do not mean nothing is wrong. They simply mean the cause does not show up on routine checks, which is common in conditions like this.

What are the symptoms of long COVID?

Long COVID can affect many systems at once, which is one of its hallmarks. As the NHS and research literature describe, common symptoms include:

• fatigue that is out of proportion to activity
• post-exertional malaise, where symptoms worsen after effort
• brain fog, with problems in memory and concentration
• breathlessness and a cough
• palpitations, chest discomfort and dizziness
• joint and muscle pain
• sleep problems, headaches and low mood
• changes to taste and smell

Symptoms often flare when you overdo things, then settle with rest. Few people experience every symptom, and the pattern is personal to each individual.

What happens in the body with long COVID?

The exact cause of long COVID is still being researched, and more than one process is likely involved. As the research literature describes, proposed mechanisms include lingering inflammation and immune disturbance after the infection, tiny problems with blood clotting and blood vessels, effects on the nervous system that controls heart rate and blood pressure, and the knock-on effects of a long illness on the whole body.

What this means in practice is that long COVID behaves like a condition driven partly by an immune system that has not fully settled back down. That is part of why treatments that aim to calm inflammation, including options like LDN, have attracted interest. It is also why pacing and gradual recovery matter so much, because pushing too hard can set the process off again.

How is long COVID assessed?

There is no single test for long COVID. As NICE describes, it is recognised by your pattern of symptoms, their timing after a COVID infection, and by ruling out other causes. Your GP may arrange blood tests and other checks, not to prove long COVID, but to make sure nothing else is being missed, such as anaemia, thyroid problems or heart issues.

In many areas, you can be referred to a long COVID or post-COVID assessment service, where a team looks at your symptoms and plans support. Getting that proper assessment matters before settling on any long-term approach.

What are the standard approaches for long COVID?

There is no single cure for long COVID yet, so care focuses on supporting recovery and managing symptoms. As the NHS and NICE describe, the recognised approaches include:

Pacing and energy management

Learning to balance activity and rest, and avoiding the boom-and-bust cycle, is central. Pacing helps prevent the crashes that come from overexertion.

Rehabilitation

Gradual, carefully guided rehabilitation can help, tailored to your symptoms. For people with post-exertional malaise, this must be done cautiously, because pushing too hard can make things worse.

Treating individual symptoms

Specific symptoms can often be helped, from breathlessness and cough to sleep, mood, headache and palpitations, coordinated through your GP or clinic.

Support for daily life

Practical support with work, activity and wellbeing all play a part in recovery. Good support can make a real difference to how you cope day to day.

These standard approaches are the backbone of managing long COVID. Anything else, including low dose naltrexone, is considered alongside them, not instead of them.

Low dose naltrexone (LDN) and long COVID

Many people with long COVID come across low dose naltrexone and ask whether it could help. Because it is an option we can offer, and one that generates a lot of interest, we want to explain it clearly and honestly, including its limits.

What is LDN?

Naltrexone is a medicine licensed to treat opioid and alcohol dependence, at a dose of around 50mg. Low dose naltrexone uses a much smaller dose, typically between about 1.5mg and 4.5mg, taken at night. At this low dose it is used off-label, meaning outside its licensed purpose, for a range of conditions where an immune or inflammatory process is thought to play a part. Because these low strengths are not available off the shelf, LDN is prepared as a compounded medicine, which for us is made by APC Labs, our compounding pharmacy partner.

The theory in long COVID

The idea behind LDN is interesting. As the research literature describes, a brief, low dose of naltrexone is thought to cause a rebound rise in the body’s own endorphins, and to have anti-inflammatory effects on immune cells, including in the nervous system. Because long COVID is thought to involve lingering inflammation and immune disturbance, some clinicians have proposed that LDN might help calm this. This is a plausible theory, and it is why LDN has been studied in long COVID, but it is important to understand that it remains early and unproven.

What the evidence actually shows

Here is the honest picture, because you deserve it. The evidence for LDN in long COVID is early and limited. A small number of pilot studies and observational reports have suggested possible improvements in fatigue and some other symptoms for some people, and larger trials are being called for and set up. But there are no large, high-quality clinical trials yet that confirm a benefit. This means we cannot promise that LDN will help your long COVID, and we will not pretend otherwise. What we can say is that some people report benefit, and that it is one option to explore with clear eyes about how early the evidence is.

What LDN is not

This is the most important part. LDN is not a cure for long COVID, and it is not a replacement for pacing, rehabilitation or your medical care. Those recognised approaches remain the foundation. If you choose to explore LDN, it should sit alongside that proper care, never instead of it, and your GP or specialist should stay informed.

Safety, and who might consider it

LDN is generally well tolerated, and side effects are usually mild, such as vivid dreams or sleep disturbance early on, and occasionally headache or stomach upset. But there are firm safety points. LDN must not be taken by anyone using opioid medicines, including many strong painkillers, because it blocks them and can trigger sudden withdrawal or stop pain relief working. It also needs caution in liver disease, and it is not recommended in pregnancy or breastfeeding without specialist advice. This is exactly why LDN is prescriber-assessed, so we can check it is safe and appropriate for you, and coordinate with your wider care.

Monitoring and ongoing care

If you and your prescriber decide LDN is worth trying, it is usually started at a low dose and increased slowly, which helps your body adjust and makes any reaction easier to spot. You will be asked how you are getting on, and whether your fatigue, sleep and daily function are changing. Because long COVID care often involves your GP or a specialist service, we encourage you to keep them updated, so everyone caring for you has the full picture. If LDN does not help after a fair trial, there is no benefit in continuing it.

Patient experiences and challenges

Living with long COVID can be a daily exercise in uncertainty. People tell us about the exhaustion that sleep does not fix, the frustration of being the same person on the outside but unable to do what they used to, and the worry of not knowing when, or if, they will fully recover. That is a lot to carry.

Many also tell us they have spent hours researching every possible option, including LDN, and found it hard to get a straight, honest answer, caught between overblown promises and blanket dismissal. That gap is exactly what we try to fill. You are not imagining your symptoms, and you are not giving up by staying under your GP while exploring your options. Both can be true at once.

How Courier Pharmacy helps with long COVID

We started Courier Pharmacy because too many people feel either dismissed or oversold, especially when they are living with a condition that others struggle to see. Long COVID is a clear example. Your symptoms, your limits and your goals are unique, so your support should be too. That personalisation is the first of our four pillars.

The other pillars carry it through. Guidance means we give you honest, evidence-based information, including the real limits of options like LDN, so you can decide with clear eyes. Trust means we are a UK-regulated pharmacy that will always tell you when something is not a substitute for proper care. Community means we show up for people, even when there is nothing to sell.

That spirit has a face in Dr Ada Jex-Cori, the voice of our approach, whose message is simple: you are not broken, and you deserve healthcare that fits your life. For long COVID, that means honest support, real options, and respect for you and your care team. Healthcare that fits you, not the other way round.

Frequently asked questions about LDN for long COVID

What is long COVID?

Long COVID is the common name for symptoms that continue long after a COVID-19 infection. As NICE describes, post-COVID-19 syndrome refers to symptoms lasting more than 12 weeks that are not explained by another cause. Common symptoms include fatigue, post-exertional malaise, brain fog, breathlessness and palpitations. The original infection may have been mild, yet the after-effects can last months.

Does low dose naltrexone treat long COVID?

Not in the way people sometimes hope. LDN is not a cure for long COVID, and the evidence is early and limited. Some small pilot studies and reports suggest possible improvements in fatigue and other symptoms for some people, but there are no large, high-quality trials confirming this yet. LDN is best understood as one option some people choose to explore, alongside pacing, rehabilitation and their medical care, rather than as a treatment for long COVID itself.

How does LDN work, and what dose is used?

LDN uses a low dose of naltrexone, usually about 1.5mg to 4.5mg at night, far lower than the 50mg used for addiction. As the research literature describes, it is thought to cause a rebound rise in the body’s endorphins and to have anti-inflammatory effects, though these mechanisms remain theoretical in long COVID. Because these strengths are not available off the shelf, LDN is compounded to order, for us by APC Labs.

Should I stop pacing or my usual treatment if I try LDN?

No. This is really important. LDN is not a replacement for pacing, rehabilitation or your medical care. Those recognised approaches remain the foundation of managing long COVID. If you choose to explore LDN, it should be alongside your usual care and your GP or clinic, never instead of them. We would always encourage you to keep them informed.

Is LDN safe to take with my other medicines?

LDN is usually well tolerated, with mild side effects like vivid dreams or sleep disturbance early on. The most important safety point is that it must not be taken with opioid painkillers, as it blocks them and can trigger withdrawal. It also needs caution in liver disease, and is not recommended in pregnancy or breastfeeding without specialist advice. This is why it is prescriber-assessed and coordinated with your wider care.

How long before I know if LDN is helping?

LDN is usually started low and increased slowly, and people who do respond often describe gradual change over several weeks to a few months rather than overnight. Keeping a simple symptom and energy diary helps you and your prescriber judge whether it is genuinely making a difference. If a fair trial brings no benefit, there is no reason to continue it.

Important disclaimer

This page is for general information and education. It is not medical advice, and it is not a substitute for a consultation with a qualified healthcare professional.

Long COVID should be assessed and managed by your GP or a specialist service, and pacing, rehabilitation and symptom management are the recognised approaches.

Low dose naltrexone is an off-label, experimental option with early and limited evidence in long COVID. It is not a cure, and it must never replace proper care or prescribed treatment. LDN must not be taken with opioid medicines.

Always speak to your GP, specialist, prescriber or pharmacist before starting, stopping or changing any treatment.

References

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3. Davis, H.E., McCorkell, L., Vogel, J.M. and Topol, E.J., 2023. Long COVID: major findings, mechanisms and recommendations. Nature Reviews Microbiology, 21(3), pp.133-146.
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