LDN: The $19 Drug Nobody Knows About
Low dose naltrexone is one of the most cost-effective interventions in longevity medicine. It costs $0.30 to compound. Here's why clinics charge 30x that — and why you shouldn't pay it.
Naltrexone at 50mg is FDA-approved for opioid and alcohol use disorder. At 1.5–4.5mg — a fraction of the approved dose — it does something completely different. That's low dose naltrexone, or LDN.
How it works
At standard doses, naltrexone blocks opioid receptors for hours. At low doses, it blocks them briefly — for 4–6 hours — then the block releases. The body responds to this transient blockade by upregulating its own endorphin production and downregulating inflammatory signaling.
The result: higher baseline endorphin levels, reduced microglial activation (the brain's inflammatory cells), and modulation of the immune system toward a less inflammatory state.
What the evidence shows
LDN has the most evidence in autoimmune and inflammatory conditions:
- **Fibromyalgia**: A Stanford pilot study showed significant reduction in pain scores with LDN vs placebo.
- **Crohn's disease**: Multiple trials showing benefit, including in pediatric patients.
- **Multiple sclerosis**: Early data suggesting reduced fatigue and improved quality of life.
- **Chronic fatigue**: Emerging evidence for LDN's role in ME/CFS.
For general longevity use, LDN is prescribed for its anti-inflammatory and immune-modulating properties, with the hypothesis that chronic low-grade inflammation is a driver of most age-related disease.
The cost situation
LDN must be compounded — standard pharmacy naltrexone comes in 50mg tablets and can't be split accurately to low doses. Compounding pharmacies produce it in capsule form at precise doses.
The compounding cost is roughly $0.30–0.50 per capsule. A 30-day supply costs about $10–15 to make. Telehealth clinics charge $75–150/month.
We charge $19/month. That covers the physician evaluation, the prescription, and your monthly supply.
Who it's for
LDN is probably the most broadly applicable drug in longevity medicine. It's safe, cheap, well-tolerated, and has decades of off-label use data. It's commonly prescribed for:
- People with autoimmune conditions or chronic inflammation
- Anyone with chronic fatigue or immune dysregulation
- People looking for a low-risk, low-cost first step into longevity medicine
The main drug interaction is with opioids — you can't take LDN if you're on opioid medications. Otherwise, the side effect profile is minimal.
The nightly routine
LDN is taken at bedtime. Most physicians start at 1.5mg and titrate up to 4.5mg over 4–6 weeks. Some patients notice sleep changes during titration — vivid dreams are common. These typically resolve within a few weeks.
Most patients who stick with it report improved energy, better sleep quality, and reduced inflammation markers. The effects are subtle but cumulative.