What is LDN, exactly?+
LDN stands for Low-Dose Naltrexone. Naltrexone is an FDA-approved medication that, at its standard 50mg dose, is used to treat opioid and alcohol use disorder. At much smaller doses — typically 1.5mg to 4.5mg — it has different effects on the body and is prescribed off-label for a range of autoimmune, inflammatory, and chronic pain conditions. The low dose isn't available as a manufactured product, so compounding pharmacies make custom capsules or liquid from the bulk pharmaceutical ingredient.
What conditions do providers prescribe LDN for?+
Providers prescribe LDN off-label for a range of conditions where reducing inflammation or modulating the immune system may help. Common categories include autoimmune conditions (Hashimoto's thyroiditis, multiple sclerosis, lupus, rheumatoid arthritis), inflammatory bowel conditions (Crohn's disease, ulcerative colitis), chronic pain conditions (fibromyalgia, complex regional pain syndrome), and other conditions like long COVID, chronic fatigue syndrome, and endometriosis. We don't prescribe LDN — that's a conversation for you and your provider — but we fill prescriptions for all of these conditions regularly.
Does insurance cover LDN?+
Most insurance plans don't cover LDN when it's prescribed for off-label uses (which is most of the time — autoimmune, inflammatory, and chronic pain conditions are all off-label uses). LDN is typically a self-pay prescription. The cost is generally lower than many manufactured medications, and LDN is typically eligible for HSA and FSA spending. We'll quote you the price up front before you commit.
How long does it take for LDN to start working?+
Effects vary considerably from patient to patient. Some report improvements in sleep, mood, or pain within a few weeks; others say they noticed changes after 2-3 months on a stable dose. Many LDN protocols involve titrating up the dose gradually over several weeks, so the full effect may not be apparent until you're at your target dose for some time. This is a question to talk through with your prescribing provider — they can give you context for your specific condition and protocol.
What are the common side effects?+
The most commonly reported side effect — particularly during the first few weeks — is vivid or unusual dreams. This typically settles down within 1-2 weeks of starting LDN or moving to a higher dose. Some patients report mild sleep disruption initially. Other potential side effects are generally mild. If you have concerns about side effects, talk to your prescribing provider — they may adjust the timing of your dose (morning vs bedtime), reduce the dose, or work through the side effects with you depending on your situation.
Why does LDN need to be compounded?+
Naltrexone is only available as a manufactured product at 50mg — the dose used for opioid and alcohol treatment. LDN protocols call for doses of 1.5mg to 4.5mg, which is roughly 1/10th to 1/30th of the manufactured dose. A regular retail pharmacy can't easily split a 50mg tablet into a 4.5mg dose, so compounding pharmacies make custom capsules or liquid from bulk naltrexone hydrochloride. The compounding piece is essential to LDN being practical.
Can I get LDN as a liquid instead of capsules?+
Yes, we compound LDN both as capsules and as a liquid (oral solution). Liquid LDN is particularly useful when your provider wants you on a very low starting dose (like 0.5mg or 1mg) or when titrating up in smaller increments than the standard 1.5mg, 3mg, 4.5mg capsule sizes. Your provider specifies the form when writing the prescription.
I don't have a provider familiar with LDN — can you recommend one?+
Many patients new to LDN find that their primary care provider hasn't heard of it or isn't comfortable prescribing it off-label. That's not unusual — LDN sits in a less mainstream area of medicine. We work with several providers in the region who prescribe LDN regularly, including functional and integrative medicine practitioners. Call our Defiance location and we can suggest options based on where you live. The LDN Research Trust also maintains a directory of LDN-prescribing providers if you want to research independently.