Disulfiram for Lyme Disease: Benefits, Risks, and What to Know
STILL SICK AFTER ANTIBIOTICS?
HEARD ABOUT DISULFIRAM?
WHAT ARE THE BENEFITS—AND THE RISKS?
Disulfiram for Lyme disease has been explored as a potential treatment for persistent infection—but its benefits remain uncertain and side effects can be significant.
“I’ve tried standard treatment—what else is out there?”
Originally used to treat alcohol dependence, disulfiram has recently been studied for possible activity against Borrelia burgdorferi, the bacterium responsible for Lyme disease.
This interest reflects a broader challenge in persistent Lyme disease symptoms, where some patients continue to experience illness after standard therapy.
Why Disulfiram Is Being Studied
Borrelia burgdorferi has survival strategies that may allow it to persist in the body.
Standard antibiotics such as doxycycline are effective for early Lyme disease, but may be less effective against stationary-phase bacteria.
This has led researchers to explore whether drugs like disulfiram could target these persister forms.
Laboratory Evidence for Disulfiram
Laboratory studies have shown that disulfiram can inhibit stationary-phase Borrelia bacteria.
In animal models, disulfiram reduced bacterial burden and inflammatory markers in tissues including the heart, ear, and bladder.
Other studies suggest that Borrelia may survive treatment with some standard antibiotics, while disulfiram demonstrated stronger activity in comparison.
However, laboratory findings do not always translate into clinical effectiveness.
Clinical Experience in Patients
Early clinical reports have described mixed outcomes.
In one series, some patients experienced prolonged remission after treatment with disulfiram, while others required retreatment.
In a larger retrospective review, 36.4% of patients who completed high-dose therapy achieved an extended remission.
While promising, these results are based on observational data rather than controlled trials.
Side Effects and Safety Concerns
Disulfiram can cause significant adverse effects, particularly at higher doses.
Common side effects include:
- Fatigue
- Psychiatric symptoms
- Peripheral neuropathy
- Elevated liver enzymes
More severe reactions, including neurologic and psychiatric complications, have been reported.
These risks require careful monitoring and clinical judgment.
Survey Findings in PTLDS
Survey data in patients with post-treatment Lyme disease syndrome (PTLDS) suggest modest symptom improvement in some individuals.
However, a high proportion of patients reported sensitivity to side effects.
This highlights the balance between potential benefit and risk.
What We Still Don’t Know
A randomized clinical trial was designed to evaluate disulfiram in PTLDS patients, but it has not been completed.
As a result, important questions remain:
- What is the optimal dose?
- Who is most likely to benefit?
- What are the long-term risks?
Further controlled studies are needed to answer these questions.
Clinical Perspective
Disulfiram is one of several repurposed drugs being investigated for Lyme disease.
While early findings suggest potential activity, the evidence remains limited and side effects can be substantial.
Standard antibiotic treatment remains the foundation of care, with newer therapies still under investigation.
Clinical Takeaway
Disulfiram for Lyme disease remains an experimental option with potential benefits and significant risks.
Patients considering this therapy should discuss it carefully with their physician.
More research is needed before its role in treatment can be clearly defined.
Frequently Asked Questions
Does disulfiram work for Lyme disease?
Some patients report improvement, but evidence is limited and not definitive.
What are the risks?
Side effects may include fatigue, psychiatric symptoms, neuropathy, and liver toxicity.
Is it FDA-approved for Lyme disease?
No. Disulfiram is approved for alcohol dependence, not Lyme disease.
Why is it being studied?
Because it may target persister forms of Borrelia that are less responsive to standard antibiotics.
Related Reading
Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.
Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention
Some people treated with disulfiram for lyme cannot tolerate more than a smaller dose. So the chance of becoming symptom free for any length of time is not good. Like with antibiotic treatment, these cases will remain chronic and will still need to keep treating. I am guessing that dapsone’s side effects may limit its use as well, especially for patients who live at a distance from the treating doctor, which is a lot of them.
I wish it were otherwise obviously.
Thanks for sharing your frustration.
I followed Dr Kenneth Liegner’s dosage plan according to your weight and self prescribed myself.
I did go into remission for 7 to 8 months which was amazing.
But it has come back with vengeance, I can’t help feel that if I was under a good practitioner maybe I could have stayed on a maintenance dose and stayed symptom free for longer.
Here in the UK there doesn’t seem to be any decent practitioners who use disulfiram or indeed even treat Lyme successfully.
If anyone can recommend a clinic in the US or Europe that would be helpful. 😉
I’ve had to get a prescription for DSF via asking for it to curtail alcohol abuse which I was able to get. I’m close to 5 months on it, although just getting to my recommended dose. I want to remain on 500 milligram for 6 months. It seems clear that the longer the recommended dose is taken the better the results.
I advise my patients who are considering disulfiram to be followed closely by their physician give the risk of adverse events.