Low Dose Naltrexone (LDN) is an exciting and emerging therapy that’s continually gaining recognition for its potential to support a wide range of health conditions. Originally developed in the 1980s as a treatment for opioid addiction, naltrexone (at doses of 50-200 mg) works by blocking opioid receptors in the brain.
However, at much lower doses—typically between 0.5 mg and 4.5 mg—LDN supports immune regulation, reduces inflammation, and enhances endorphin production, making it a promising option for chronic and autoimmune conditions.
In 1985, Dr. Bernard Bihari, a Harvard-trained physician, discovered that low doses of naltrexone had a profoundly positive effect on the immune system.
Taking LDN before bed briefly blocks opioid receptors during a critical window (typically between 2 a.m. and 4 a.m.) when the body’s natural endorphins peak. This temporary blockade stimulates the body to produce more endorphins and increases the number of opioid receptors.
These changes are thought to help balance the immune system and reduce central nervous system inflammation.
How is LDN Used Clinically?
LDN is prescribed in low doses (most commonly between 3 mg and 4.5 mg) and is usually taken at bedtime, as this aligns with the body’s natural endorphin production cycle.
Its key mechanism is the temporary blockage of opioid receptors, which leads to a rebound increase in endorphin levels. These endorphins play a critical role in modulating the immune system and reducing inflammation.
LDN is typically administered as a pill, but it can also be compounded into liquid form. It’s essential to work with a knowledgeable healthcare provider who understands LDN and can customize the dose based on individual needs.
Conditions That Benefit from LDN
LDN’s versatility stems from its ability to modulate the immune system and reduce inflammation. Here are some of the most common conditions it’s used to treat:
Autoimmune Disorders
- Multiple Sclerosis (MS): Studies suggest LDN can reduce spasticity, fatigue, and overall disease progression.
- Inflammatory Bowel Disease (IBD): Research shows significant improvement in symptoms of Crohn’s disease (including Pediatric Crohn’s) with LDN therapy.
- Hashimoto’s Thyroiditis: Patients often report reduced thyroid antibodies and improved energy levels.
Chronic Pain & Inflammatory Conditions
- Fibromyalgia: LDN can significantly reduce pain and fatigue in fibromyalgia patients.
- Arthritis: Both rheumatoid arthritis and osteoarthritis patients have noted reduced joint pain and stiffness.
Neurological & Psychiatric Disorders
- Parkinson’s Disease: LDN’s anti-inflammatory effects may protect nerve cells and improve symptoms.
- Depression and Anxiety: By boosting endorphin levels, LDN can improve mood and resilience.
Cancer & Immune Support
While not a standalone cancer treatment, LDN is sometimes used adjunctively to modulate the immune system and improve quality of life in cancer patients.
Advantages of LDN
The appeal of LDN lies in its unique combination of safety, affordability, and broad-spectrum potential:
- Minimal Side Effects: Because it’s used at such low doses, LDN’s side effects are mild and often temporary. Some people report vivid dreams or mild sleep disturbances initially, but these typically resolve.
- Cost-Effective: LDN is relatively inexpensive, even when compounded by specialty pharmacies.
- Wide Applicability: Its ability to modulate the immune system makes it a promising option for a variety of chronic conditions.
Where to Learn More
If you’re interested in exploring LDN further, consider these resources:
- Consult an Expert: Dr. Roy attended the LDN 2014 National Conference in Las Vegas. For more than a decade, he has been researching and using LDN in his integrative practice. Consult with Dr. Roy or with a healthcare provider experienced in LDN therapy to see if it might be right for you. Please note, while Dr. Roy is an Integrative Pediatrician, in certain cases he can meet with adults in the state of Colorado and prescribe LDN when appropriate.
- The LDN Research Trust: This nonprofit organization offers a wealth of information, including patient success stories and research updates.
- LDN Science: The most credible up-to-date information about Low Dose Naltrexone (LDN) for physicians, researchers, and patients.
- Low Dose Naltrexone: Sponsored by Advocates for Therapeutic Immunology, this website provides information to patients and physicians about important therapeutic breakthroughs in advanced medical immunology.
- PubMed is an excellent resource for peer-reviewed articles and scientific studies on LDN.
- Books:
- The Promise of Low Dose Naltrexone Therapy by Elaine Moore
- The Power of Honest Medicine by Julia Schopick
- Up the Creek with a Paddle by Mary Boyle Bradley
- The LDN Book: Volume 1, Volume 2, Volume 3
