Clinical trial Recruiting at 1 site Early Phase 1 Interventional Ages 18 to 75

Ceftriaxone treatment for persistent Lyme disease symptoms

Official title: Phase 1, Randomized, Double-Blind, Placebo-Controlled Trial of Pulse Dosed Ceftriaxone for Post-Treatment Lyme Disease

Run by State University of New York - Upstate Medical University · NCT06611111 · Data updated 2026-11-12

This study is testing if a new way of giving the antibiotic Ceftriaxone can help adults aged 18 to 75 who still have symptoms after being treated for Lyme disease feel better.

Quick facts

PhaseEarly Phase 1
Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment44 (estimated)
SponsorState University of New York - Upstate Medical University
Academic / other
Locations1 site (East Syracuse, New York)
StatusRecruiting
StartedFebruary 3, 2025
Main results expectedDecember 2026
Study endsDecember 2026
Registry record updatedMarch 19, 2026
Trial IDNCT06611111 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 to 75 with a history of Lyme disease and ongoing symptoms that interfere with daily functioning.

Probably not a fit

Patients who are currently pregnant or lactating, or those who have not been off antibiotics for at least 6 weeks prior to enrollment may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial aims to evaluate the safety and efficacy of Ceftriaxone, an FDA-approved antibiotic, administered in a pulse dose regimen to adults aged 18 to 75 who are experiencing persistent symptoms after Lyme disease treatment. Participants will receive intravenous infusions of either Ceftriaxone or a placebo every 5 days for 6 weeks, followed by assessments of their symptoms and overall health. The study will include various questionnaires to measure fatigue, pain, mental health, and other factors, with follow-up evaluations extending up to one year post-treatment.

Why it matters

Potential benefit: If successful, this treatment could significantly alleviate persistent symptoms in patients suffering from Post-Treatment Lyme Disease.

How similar studies have gone: While there is limited research specifically on pulse dosing Ceftriaxone for this condition, similar studies exploring alternative treatments for Post-Treatment Lyme Disease have shown varying degrees of success.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Age 18 to 75 at the time of consent
2. Ability and willingness to sign informed consent
3. Available for the study period
4. Must have met the definition of a prior well-defined or probable Lyme disease infection, AND meet the definition of PTLDS
5. Provide consent for release of medical history records from primary care physician, college or university, urgent care or emergency room visit
6. Have a level of fatigue that interferes with their ability to function in their job, schooling, or other social/personal activities (FSS score of 4 or higher)
7. Subjects will need to have been off of antibiotics (those standard antibiotics used to target Lyme disease to include doxycycline, amoxicillin, cefuroxime, azithromycin, ceftriaxone or penicillin) for at least 6 weeks prior to study enrollment and be willing to remain off of any outside antibiotics during the duration of the treatment component of the study.

Exclusion Criteria:

1. Female: pregnant or lactating
2. Women who intend to become pregnant during the treatment study period (approximately 45 days)
3. Patients with a diagnosis of Lyme disease based on only a positive Lyme IgM immunoblot
4. A history of cephalosporin allergy or significant intolerance
5. Lyme related symptoms that have been present for greater than 10 years
6. Blood tests confirming infection with human immunodeficiency virus- 1 (HIV-1), hepatitis C, hepatitis B (assessed by HbsAg) virus.

   Note: Subjects who have well controlled HIV, who are on ART with a CD4 count greater than 200 will be allowed to participate.
7. Diagnosis with Bipolar Disorder or Schizophrenia, hospitalization in the past year for a mental health disorder, or any other psychiatric condition (to include any finding of increased suicide risk as identified by a rating of moderate or high risk on the CSSRS assessment), which in the opinion of the investigator prevents the subject from participating in the study
8. Known concurrent rheumatologic or similar disease thought to interfere with study participation or confound results at the discretion of the investigator. These may include but are not limited to rheumatoid arthritis, systemic lupus erythematous, Sjogren's syndrome, scleroderma, psoriasis, fibromyalgia, chronic fatigue syndrome/myalgic encephalomyelitis, or obstructive sleep apnea
9. Hives, shortness of breath, swelling of the lips or throat, or hospitalization related to a previous treatment with a cephalosporin antibiotic, or severe allergic reaction to penicillins (e.g. anaphylaxis or severe rash with Stevens Johnson syndrome or similar)
10. Planned travel during the study period that would interfere with the ability to complete all study visits (this can be a temporary exclusion with plan to schedule enrollment during a window of time during which they could attend their study visits)
11. Significant screening physical examination abnormalities or chronic medical condition that in the opinion of the investigator may impact subject safety
12. 12\. Participation (active or follow-up phase) or planned participation in another vaccine, drug, or medical device in the 4 weeks prior to this trial, within 5 times the elimination half-life, whichever is longer, or during the trial
13. Prior history of Clostridium difficile infection
14. Currently taking warfarin (Coumadin)
15. Unable to comply with study requirements
16. Clinician discretion

Where it's running

  • SUNY Upstate Medical University, Upstate Global Health Institute
    East Syracuse, New York, United States
    Recruiting

Study contacts

  • Principal investigator: Kristopher Paolino, MD — State University of New York - Upstate Medical University
  • Study coordinator: Keely Terrillion
  • Email: trials@upstate.edu
  • Phone: 315-464-9869

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.