Comparing different amoxicillin treatments for erythema migrans

Different Duration and Dosing of Amoxicillin in Patients With Erythema Migrans. A Randomized Clinical Trial.

Phase 3 Interventional University Medical Centre Ljubljana · NCT03966014

This study tests which length of amoxicillin treatment works best for people with erythema migrans, a common symptom of Lyme disease.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment200 (estimated)
Ages18 Years and up
SexAll
SponsorUniversity Medical Centre Ljubljana Academic / other
Locations2 sites (Ljubljana and 1 other locations)
Trial IDNCT03966014 on ClinicalTrials.gov

What this trial studies

This study aims to evaluate the effectiveness of various amoxicillin treatment regimens in patients diagnosed with erythema migrans, a common manifestation of Lyme disease. Participants will be assigned to receive one of four treatment protocols: amoxicillin for 10 days, amoxicillin for 14 days, or a control group. The goal is to determine which regimen provides the best outcomes in terms of symptom resolution and overall efficacy. The study will involve close monitoring of patient responses to the different treatment durations.

Who should consider this trial

Good fit: Ideal candidates for this study are individuals diagnosed with erythema migrans who meet the inclusion criteria.

Not a fit: Patients who are pregnant, have extracutaneous manifestations of Lyme borreliosis, or are immunocompromised may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to optimized treatment protocols for erythema migrans, improving patient outcomes and recovery times.

How similar studies have performed: While there have been studies on antibiotic treatments for Lyme disease, this specific comparison of amoxicillin regimens is novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* erythema migrans

Exclusion Criteria:

* pregnancy
* extracutaneous manifestations of Lyme borreliosis
* immunocompromising state
* serious adverse event to beta lactam antibiotic
* receiving antibiotic with antiborrelial activity within 10 days

Where this trial is running

Ljubljana and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Erythema Migrans
Last reviewed 2026-06-13 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.