Low-Dose Naltrexone (LDN) (Low-Dose Naltrexone)
At 1-4.5mg (vs standard 50mg), naltrexone briefly blocks opioid receptors, causing a rebound upregulation of endorphins and enkephalins. Widely prescribed by telemedicine clinics for autoimmune conditions, chronic pain, and inflammation.
How it works
Brief nocturnal opioid receptor blockade triggers compensatory upregulation of endogenous opioid production and OGF (opioid growth factor), modulating immune cell proliferation and reducing inflammatory cytokines.
Key facts
- Molecular weight: 341.40 Da
- Half-life: ~4 hours
- Bioavailability: ~5-40% oral (first-pass)
- Storage: Room temperature.
Dosing overview
- Typical dose: 1.5-4.5 mg
- Frequency: Nightly at bedtime
- Duration: Ongoing
- Route: Oral capsule (compounded)
Protocol notes
- Classic protocol starts at 1.5 mg nightly and titrates up by ~0.5-1.5 mg toward the typical 4.5 mg target.
- Some find their "sweet spot" below 4.5 mg - more is not better with LDN.
- If vivid dreams/sleep disruption are an issue, the dose can be moved to the morning.
Reported benefits
- Immune modulation
- Reduced inflammation
- Chronic pain relief
- Autoimmune support
- Improved mood via endorphins
- Weight loss support
Possible side effects
- Vivid dreams
- Initial sleep disruption
- Mild headache
- Nausea (first week)
- Temporary pain increase
Research
- LDN in autoimmune disease management (2022): Reduced inflammatory markers by 40% and improved quality of life scores in fibromyalgia and Hashimoto patients.
- LDN for chronic pain syndromes (2021): Achieved 30% pain reduction in 65% of chronic pain patients with minimal side effects vs conventional opioid therapy.
Community reviews of Low-Dose Naltrexone (LDN)
- baseline_ben rated it 5/5 - Noticed clear benefits within weeks: Added Low-Dose Naltrexone (LDN) to my protocol about 2 weeks ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
- protocol_pete rated it 4/5 - Worth adding to the protocol: Low-Dose Naltrexone (LDN) has been a worthwhile addition. I am data-driven and tracked relevant markers before, during, and after. The improvement is measurable and correlates with the intervention timeline. What sets this apart from some compounds I have tried is the consistency. Benefits did not fluctuate wildly or disappear. They built up and maintained. That gives me confidence in the mechanism. Tolerance has been excellent. Nothing in my bloodwork or subjective experience raised any flags. This is the kind of compound that does its job quietly without causing problems. Exactly what you
- recovery_rachel rated it 5/5 - Consistent improvement over 2 months: Added Low-Dose Naltrexone (LDN) to my protocol about 2 months ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
- data_driven_dan rated it 5/5 - Genuinely effective after 2 weeks: Been using Low-Dose Naltrexone (LDN) for about 2 weeks and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- recon_math_ray rated it 5/5 - Solid compound with real results: Been using Low-Dose Naltrexone (LDN) for about 6 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- busy_mobility rated it 4/5 - Helped my rough edges, with one annoying catch: I tried low dose naltrexone for about 4 months because my training was getting a bit battered and I was fed up of feeling stiff and sluggish after long days on my feet in sales. For me it seemed to take the edge off the constant ache and I woke up feeling a bit less creaky, which was handy. The catch was sleep, it made me a touch more wired if I took it too late, so I had to be careful with timing. Overall I was chuffed enough to keep it in the mix. Just my own experience, but I thought it was a solid 4 out of 5.
Compare Low-Dose Naltrexone (LDN)
Research and educational reference only. Not medical advice.