Tafenoquine for Relapsing Babesia: A Treatment Option When Standard Therapy Fails
STILL RELAPSING AFTER BABESIA TREATMENT?
WHEN STANDARD THERAPY ISN’T ENOUGH
“I got better—but then it came back.”
Relapsing Babesia is a frustrating pattern many patients recognize—symptoms improve, then return weeks or months later.
Quick Answer: Tafenoquine may be an option for relapsing Babesia when standard therapy fails.
Clinical Insight: Recurrent symptoms after treatment should prompt consideration of persistent infection, resistance, or co-infections.
For a complete overview of Babesia symptoms, testing, and treatment, visit our Babesia and Lyme disease guide.
Patients with relapsing Babesia often present with recurring symptoms such as night sweats, air hunger, and fatigue—despite prior treatment.
Initial treatment and relapse pattern
The initial treatment included atovaquone and azithromycin for 10 days.
Two months later, symptoms returned and the blood smear was again positive.
This cycle repeated—second relapse, then a third—each occurring roughly two months apart.
This pattern is common in persistent Babesia infections, especially in immunocompromised patients.
Why tafenoquine may help
Tafenoquine is an 8-aminoquinoline and a primaquine analogue approved for malaria prophylaxis and relapse prevention.
Its long half-life and activity against intraerythrocytic parasites make it a potential option for difficult Babesia cases.
Experimental studies suggest tafenoquine may help clear Babesia microti in relapsing infections.
Who is at risk for relapsing Babesia?
Relapsing infection is more common in:
- Immunocompromised patients
- Individuals with asplenia
- Patients with delayed diagnosis
- Those with incomplete initial treatment response
These patients often require longer or alternative treatment strategies.
Clinical perspective
Relapsing Babesia often reflects more than a simple treatment failure.
Persistent infection, drug resistance, or co-infections may all play a role.
In these cases, clinicians may need to extend treatment or consider alternative therapies such as tafenoquine.
Frequently Asked Questions
What is tafenoquine?
Tafenoquine is an antimalarial medication that has shown potential in treating relapsing Babesia infections.
When is tafenoquine used for Babesia?
It may be considered when symptoms return after standard therapy such as atovaquone and azithromycin.
Why does Babesia relapse?
Relapse may occur due to persistent infection, resistance, or immune factors—especially in high-risk patients.
How long is treatment needed?
Treatment duration varies and may be longer in complex or relapsing cases.
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
Tested positive to B. Duncani multiple times, treated with many different AB, including ATovaquone, Malarone, for over a year, they symptoms come back as when I go off AB, and only partially resove when on them, I gave up.
There seems to be no protocol on treating Lyme & Babesia or real diagnostic tool to know what I we are suffering from, a bunch of guessing and very expensive too. The LLMD medicine is really a guessing game with a bunch of AB. & herbs / vitamins based on hearsay, also copy and paste of what the famous Dr. Horowitz or Dr. Jemsek may have speculated sometime in the past. LLMD’s are hesitant to go all in on IVIG or intv. AB, leave it up to the patient to run around to convince someone to treat them. They dont even know when to stop, usually ends when the patient has spent all they got and are coming to term with the pain.
Primary care physicians I have seen say it’s one of the following herniated disk, fibro myalgia, sleep apnea, stress, pre diabetic, and when I developed all of this in such a short period of time, I am told we dont know (or dont care)
I have given up hope.
Joel,
Most of us have the same issue with PC.
I can’t even get them to test for other issues. I begged for years and finally got 2 additional tests when I tested positive for qfever. Then the PC said he didn’t know what to do with the results.
Contacted the health department and they referred me back to the same pc.
Of the several people I know with Babesia duncani (including myself) NOT ONE has been able to eradicate it with any combination of drugs and/or herbs.
I think most anti Protozoa drugs are anti cancer drugs when you can benefit from an unfettered search on internet ( as I can from overseas) and dig about forty pages of repeated material ( yawn) in. I’m so glad you’re feeling better. Babesia has something to teach us all quite obviously. My homeopath doctor in Brasilia also uses magnetic resonance and is quite genius. It’s great you study this and are inspired by your recovery.
I am currently using this to treat a very persistent case of Babesia, and I am immune- compromised. What dose did this person take for six weeks?
“3/10/20 he was started on a 6 week regimen of tafenoquine aloneThe dose was 200 mg daily for three consecutive days and then 200 mg per week, i.e., the regimen FDA approved for malaria prophylaxis” wrote the Marcos LA, etc You can read the article on pubmed at https://pmc.ncbi.nlm.nih.gov/articles/PMC8885462/
Is this treatment successful for patients with additional infections symptoms ch as bartonella, Lyme and Rocky Mtn Spotted Fever?
No
I have been on tafenoquine 200mg weekly for 2 years for chronic babesiosis and I do think it worked well for me.
However my son was treated with the same regimen along with atovaquone for 8 months. For acute babesia duncani the dosage should be prescribed differently.
Thank you for sharing your experience. Treatment decisions, including medication choice, dose, and duration, need to be individualized and guided by a treating clinician. I can’t comment on specific regimens in comments.
Good luck trying to get it. I’m too tired to continue trying to track down someone that carries tafenoquine. Pharmacies are not going to help you. Just keep saying it’s on backorder. My doctor is so busy, but I have a call into his office, to see if he can find out how to get it. I have tried all the other anti malaria drugs. None of them helped with Babesia Duncani.
FYI: In the past I tested indeterminate for Lyme, positive for anaplasomosis and ehrlchiosis. They didn’t show up on my last panel. I had been on doxycycline for two years. The test I had in 2019 showed babesia duncani. My doctor ran another panel this past year. It showed the B. Duncani is worse, and didn’t respond to previous treatments, plua I have a different borrelia infection called Borrelia Hermsii.
You’re also right that doxycycline alone is not effective for Babesia, which requires a different approach.
Cases like yours are a reminder that these illnesses are often more complicated than a single infection.
My doctor from Washington state was able to get tafenoquine from a pharmacy in Florida. Good grief. So I’m now living in Wisconsin. I could not find a good or honest LLMD, functional medicine doctor, or LLND in Wisconsin. So I am still being treated based upon my testing from my doctor that I had in Washington. I still can’t believe the shysters here in Wisconsin. I also noticed the people I know in Wisconsin that were able to get proper treatment are all men. I’m starting to see a pattern..