Low-Dose Naltrexone in Perimenopause: What You Should Know

If you've been exploring options for persistent pain, fatigue or other symptoms during perimenopause, you may have come across something called low-dose naltrexone (LDN).

LDN has attracted interest in recent years, particularly in the management of some chronic pain and inflammatory conditions.

But what exactly is it?

Does it have a role in perimenopause?

And what does the evidence actually tell us?

The short answer is that LDN is an interesting area of emerging research, but it is not a menopause treatment and the evidence for using it specifically during perimenopause remains limited.

Let's look at what we know.

What Is Low-Dose Naltrexone?

Naltrexone is an established prescription medicine that acts as an opioid receptor antagonist. In Australia, naltrexone is registered for specific indications including alcohol dependence and as part of treatment for people who have ceased opioid dependence.

Low-dose naltrexone refers to much smaller doses than those typically used for its approved indications. It is prescribed off-label for a range of conditions, including some chronic pain conditions.

The doses used in studies vary, but commonly fall within the low-dose range of approximately 0.5 to 6 mg per day.

LDN is thought to have effects beyond its opioid receptor activity, including possible effects on neuroinflammatory pathways. However, many of the proposed mechanisms are still being investigated, and we should be careful not to describe these mechanisms as established clinical outcomes.

Why Is LDN Being Discussed During Perimenopause?

Perimenopause can bring a wide range of symptoms.

Changing hormone levels can affect sleep, mood, energy, pain sensitivity and overall wellbeing. At the same time, some women may be managing health conditions that existed before perimenopause or become more noticeable during this stage of life.

This has led some clinicians to explore whether treatments such as LDN may have a role for specific symptoms or co-existing conditions.

However, it's important to make a distinction:

LDN has not been established as a treatment for perimenopause itself.

There is currently limited direct research examining LDN specifically in women going through perimenopause.

Instead, most of the research has focused on other conditions, particularly chronic pain.

That means any use during perimenopause needs to be considered on an individual basis.

What Does the Evidence Tell Us?

Research into LDN is still developing.

Studies have investigated its potential use in conditions including:

• Chronic pain
• Fibromyalgia
• Complex regional pain syndrome
• Some inflammatory and autoimmune conditions
• Other conditions involving pain or neuroimmune pathways

The results have been mixed.

A 2025 meta-analysis found that LDN showed some benefit compared with placebo for pain in people with fibromyalgia, although other outcomes did not consistently improve.

Another 2025 meta-analysis found that LDN was better than placebo for fibromyalgia pain, but the authors also noted the need for further research.

Other systematic reviews have found insufficient evidence to draw firm conclusions about LDN for chronic pain more broadly.

More recent reviews continue to describe LDN as an emerging area where larger, better-designed clinical trials are needed.

So while there is genuine scientific interest, LDN should not be presented as a proven treatment for inflammation, menopause symptoms or weight management.

Could LDN Help With Symptoms During Perimenopause?

This is where individualised care becomes important.

If you're experiencing persistent symptoms during perimenopause, the first step is understanding what's contributing to them.

For example, joint or muscle pain may have multiple causes. Sleep disruption may be related to night sweats, stress, anxiety, pain or another health condition. Fatigue can also have many possible contributors, including sleep, iron deficiency, thyroid conditions, mental health and other medical issues.

For some women with a separate condition for which LDN may be considered, it may form part of a broader treatment plan.

Depending on your circumstances, this could include discussion of LDN for symptoms such as chronic pain where other appropriate options have been considered.

But it shouldn't replace a proper assessment of your perimenopause symptoms.

LDN and Hormone Therapy Are Not the Same Thing

LDN is not a hormone.

It doesn't replace oestrogen, progesterone or testosterone, and it shouldn't be thought of as an alternative to menopausal hormone therapy (MHT).

MHT is used to address symptoms and health considerations related to menopause when it is clinically appropriate.

LDN, on the other hand, may be considered for a specific condition or symptom outside the direct treatment of menopause.

That means the two should not be thought of as competing treatments.

The more useful question is:

What is contributing to your symptoms, and which treatments are appropriate for you?

What Does Starting LDN Involve?

Because LDN is prescribed off-label, treatment should be individualised and supervised by an appropriately qualified healthcare professional.

There isn't one universally established dosing schedule for LDN, and the dose used will depend on the individual and the reason it is being prescribed.

Some clinicians start with a very low dose and gradually increase it, while monitoring symptoms and tolerability.

Potential side effects can include:

• Vivid dreams
• Sleep disturbance
• Headache
• Nausea
• Gastrointestinal symptoms

Evidence around long-term use at low doses is still developing, which is another reason appropriate medical supervision is important.

An Important Safety Consideration

Naltrexone blocks opioid receptors.

This means it can interfere with opioid medicines and is not suitable for people currently using opioid medicines or who are opioid-dependent without appropriate medical management. It can also complicate the management of acute pain and surgery.

This is particularly important to discuss with your healthcare provider before starting treatment. Australian product information highlights the interaction between naltrexone and opioid medicines.

Never start or stop naltrexone without discussing it with your prescribing clinician.

Is LDN Right for You?

LDN isn't something every woman experiencing perimenopause needs.

If you're experiencing symptoms, the first step should be understanding the bigger picture.

That may include looking at:

• Your stage of perimenopause
• Your menstrual and symptom history
• Sleep
• Pain
• Medications
• Mental and emotional wellbeing
• Thyroid and other health conditions where appropriate
• Your current hormone treatment
• Your individual health goals

If there is a specific condition or symptom for which LDN may be appropriate, your clinician can discuss the potential benefits, limitations and risks with you.

The goal isn't to keep adding treatments.

It's to make sure every part of your care has a clear purpose.

Looking Beyond One Treatment

Perimenopause can be a complicated time because several things can change at once.

You may be managing changing hormones alongside sleep disruption, pain, stress, metabolic changes or an existing health condition.

That's why we don't believe in automatically attributing every symptom to menopause or adding another treatment without understanding why you're experiencing it.

Instead, we look at the whole picture.

Sometimes that means hormone therapy.

Sometimes it means addressing sleep, nutrition, movement or another underlying health issue.

And for some women, an off-label treatment such as LDN may be worth discussing as part of a broader care plan.

The right approach depends on you.

Understanding Your Options

LDN is an interesting and evolving area of medicine, but it isn't a proven treatment for perimenopause itself.

The current evidence is strongest in certain areas of chronic pain research, while evidence for many other proposed uses remains limited.

If you've come across LDN and are wondering whether it could have a place in your care, you're welcome to discuss it with your healthcare provider.

At My Menopause Clinic Australia, we take the time to understand your symptoms, health history and goals before considering treatment options.

If you're experiencing persistent symptoms during perimenopause and want to understand what's contributing to them, book a consultation today.

Together, we'll look at the whole picture and explore evidence-based options that are appropriate for you.