You’ve tried doing everything right. The medication. The diet. Maybe a supplement or two. And you still don’t feel like yourself.

If someone in a Facebook group or a podcast mentioned LDN and you filed it away to research later, this is that research.

I actually take LDN. I’ve had it the last couple of winters. When I got a new prescription recently and switched to a different compounding pharmacy, they sent me the most thorough patient packet I’d ever seen. A welcome letter, an overview of LDN, and a symptom tracker. I was so impressed I reached out and asked if I could interview one of their pharmacists.

That pharmacist is Steve Anderson. He owns The Apothecary, a compounding pharmacy in Minnesota and Wisconsin, and has been working in functional and integrative medicine for over 30 years. Everything in this post comes from that conversation.

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Extended cut. Watch the full interview.

What LDN actually does in the body

LDN works through two main actions.

The first is endorphin production. LDN significantly increases endorphin levels in the body. Most people think of endorphins as pain relief, and they do help with that. But endorphins also affect bone health, heart health, brain health, mood, and mental clarity. People often notice they just feel better, even before they can point to a specific reason why.

The second action is immune system support. LDN increases the body’s own anti-inflammatory markers. The ones your body naturally produces but may not be producing efficiently when inflammation is high.

Together, these two actions lower inflammation throughout the body from head to toe. That matters for any autoimmune or inflammatory condition, not just Hashimoto’s.

Why LDN for Hashimoto’s works on a different problem than your thyroid medication

Your thyroid medication (levothyroxine, Synthroid, Armour, whatever you’re taking) addresses your thyroid hormone levels. That’s what it was designed to do. It is not designed to address the immune system that is attacking your thyroid.

LDN works on the immune side. It’s not stimulating the immune system. It’s not suppressing it either. Steve described it this way: it helps normalize the immune system. It supports the body in doing what it’s supposed to do.

Think of it as working on two different problems. Thyroid medication handles the hormone piece. LDN addresses the inflammation and immune dysregulation piece. These are not the same problem, and one medication cannot do both jobs.

That’s a big reason why some women with Hashimoto’s continue to struggle even when their labs look fine on paper. The thyroid numbers may be in range. The immune system piece is still running unaddressed.

If you want a deeper look at how your thyroid labs connect to all of this, this episode on thyroid labs is a good place to start.

How LDN affects your labs and your other medications

A few things worth knowing before you talk to your provider.

On labs: LDN can bring inflammatory markers down over time. For Hashimoto’s specifically, Steve mentioned that it has the ability, given the right dose and time, to positively impact TPO antibodies and thyroid antibodies. He said it will not interfere with labs being drawn, and should improve them over time.

On thyroid medication: Because LDN lowers inflammation and clears up the body’s signaling pathways, your thyroid medication may actually work more efficiently. Some people end up needing a lower dose of their thyroid medication after starting LDN because their body is absorbing and using it better. Steve said this is not uncommon at all. So if you’re on thyroid medication and you start LDN, keep your provider in the loop and watch your labs. If you’re newer to thyroid medication and want a solid overview of how it works, this episode on starting Synthroid or levothyroxine covers the basics.

On other medications and supplements: LDN plays well with almost everything. The one exception is opioid or narcotic drugs. Those do interact with naltrexone. Everything else, including supplements, is complementary. In fact, Steve made the point that LDN may make your supplements more effective because it’s clearing the inflammation that was blocking absorption in the first place.

If you’re on biologics (medications like injections used for other autoimmune conditions that work by dampening the immune system), there has been some hesitation about combining those with LDN. Steve clarified that this concern comes from a misunderstanding. Biologics calm the immune system down. The concern was that LDN would work against that by stimulating the immune system. But again, LDN doesn’t stimulate. It normalizes. That’s a meaningful distinction.

How dosing works and what to expect when you start

LDN is not a one-dose-fits-all medication. That’s actually one of the reasons it has to be compounded. You start low and taper up slowly until you find the dose that works for your body.

Steve said they follow up with patients once a month to help guide that process. You’re looking for the dose where you notice benefits without side effects. If side effects show up, that’s your signal you’ve gone a little too high. You dial back a bit.

Side effects are generally mild, and most happen in the early stages when you’re adjusting. They can include:

• Headache
• Nausea or GI upset
• Fatigue (the body is doing a lot of internal work as it adjusts)
• Vivid dreams

On the vivid dreams: this comes up a lot. Steve said they’re typically not nightmares or anything distressing. People describe them as colorful. Kind of interesting, actually. For most people, this settles down after a few weeks. If it’s bothering your sleep, taking LDN earlier in the evening (with dinner instead of at bedtime) can help in the short term.

One thing Steve made clear: there’s no reason it shouldn’t help, at some dose, for virtually anyone dealing with autoimmune inflammation. The key is finding the right dose for you. You can’t guess it. You have to work up to it.

Morning vs. evening dosing and the brain health connection

Traditionally, LDN has been taken in the evening. That’s still common. But there’s a newer understanding that’s changed how many providers and pharmacists approach dosing.

A low morning dose, less than half a milligram, has a particularly strong effect on brain health, mental clarity, mood, and energy. Steve said this has only become clearer in the last few years, and they’ve now seen it in thousands of patients. The morning dose targets that brain health and mental health side of things. The evening dose, which tends to be higher, is the one that works more on the autoimmune and inflammatory piece.

So many people starting LDN now are actually taking it twice a day. A very small morning dose for brain health and energy, and a higher evening dose for immune support.

If you’re already on LDN and taking it once in the evening, and you add a morning dose, these are treated as two separate doses. The morning dose gets adjusted independently based on how you respond on the brain health side. Your evening dose stays focused on the autoimmune piece.

Do you have to take LDN forever?

This question gets asked constantly at the conferences Steve attends, where providers come to learn about LDN.

He said the honest answer is “it depends.”

If the underlying issue that drove the inflammation has been fully addressed, it may be possible to come off LDN after a period of time, maybe a year or two. But there’s also a strong argument for staying on it long-term. Most disease processes, including cardiovascular disease and autoimmune conditions, have an inflammatory component. LDN works to lower that inflammation every day you take it. For some people, the brain health, mood, and energy benefits alone become a reason to stay on it.

Steve mentioned that a lot of the medical providers who attend these conferences, even younger ones with no health issues, are starting LDN just for its preventive and brain health benefits. That gives you a sense of how those working closest to this medication are thinking about it.

What this means for you practically: it’s a conversation to have with your provider over time, not a decision you need to make before you start.

What is a compounding pharmacy and why it matters for getting LDN

While Naltrexone is at a standard pharmacy, it is not available in such low doses. Low Dose Naltrexone is not commercially manufactured. You can’t pick LDN up at a standard pharmacy. You need a prescription from a provider, and you need a compounding pharmacy to fill it.

A compounding pharmacy prepares medications that aren’t commercially available or that need to be customized for the individual. This is exactly why LDN has to be compounded. The dose is highly individualized. There’s no off-the-shelf version that works for everyone.

If you’re in Minnesota or Wisconsin, The Apothecary (where Steve Anderson works) is an option.

If you’re outside that area, you can ask your prescribing provider for a referral to a compounding pharmacy in your state, or ask if they work with one regularly. This is increasingly common as more providers learn about LDN.

One more thing Steve mentioned: a good compounding pharmacy won’t just send you your prescription and disappear. They should follow up with you as you’re finding your dose. If yours doesn’t, you can ask. It’s reasonable to expect that kind of support.

Read more at The Apothecary’s LDN page

LDN is not a magic fix. Nothing is. But it works on a part of Hashimoto’s that most conventional treatment plans don’t address at all.

If this is something you want to explore, the next step is bringing it to your provider. That conversation goes better when you walk in knowing what to ask. Grab the free 10 Questions to Ask Your Doctor guide and bring it to your next appointment.