What conditions is LDN commonly prescribed for?
LDN is most often prescribed off-label for chronic pain conditions such as fibromyalgia and complex regional pain syndrome, for autoimmune and inflammatory conditions including Crohn’s disease, ulcerative colitis, multiple sclerosis, and Hashimoto’s thyroiditis, and for chronic fatigue and post-viral syndromes. Evidence quality differs substantially between these — fibromyalgia and Crohn’s disease have the most published support, while several other uses rest largely on small studies and clinical experience.
Where the evidence is strongest
Fibromyalgia has the most consistent published support, with small randomized trials reporting reduced pain scores. Crohn’s disease has pilot trial data suggesting benefit in some patients. Multiple sclerosis has been studied primarily for quality of life and symptom measures rather than disease progression.
Even in these conditions the studies are generally small, and LDN is usually considered alongside established treatment rather than instead of it.
Where it is used with thinner evidence
Hashimoto’s thyroiditis, rheumatoid arthritis, psoriasis, chronic fatigue syndrome, long COVID and other post-viral presentations, and various chronic pain syndromes are all conditions for which LDN is prescribed based largely on clinical experience and small case series.
That does not mean it cannot help — but it does mean an honest conversation should distinguish between what has been studied and what is being tried.
How it fits alongside other treatment
LDN is generally added to existing management rather than replacing it, and it is not a substitute for disease-modifying therapy in autoimmune conditions. Stopping an established treatment in favour of LDN is not an approach we would support.
The one absolute constraint is opioid medication: naltrexone blocks opioid receptors, so LDN is not compatible with opioid pain management and requires planning around any procedure where opioid analgesia may be needed.
More about Low-Dose Naltrexone Therapy
Talk through whether it applies to your condition
Book a consultation with our Folsom naturopathic team to discuss your diagnosis, current treatment, and whether LDN has a role.
Bring recent lab work if you have it — we’ll review it with you.
Medical disclaimer: The information on this page is for general education and is not medical advice, diagnosis, or treatment. Low-dose naltrexone is used off-label for all conditions listed here, and evidence quality varies considerably between them. This page does not claim or imply effectiveness for any condition or individual. LDN is not a substitute for established or disease-modifying treatment. Naltrexone blocks opioid receptors and can interact dangerously with opioid medications. Do not stop or change any prescribed treatment without consulting the provider who prescribed it.