Comparing oral antibiotics to outpatient parenteral therapy for infective endocarditis

Oral Antimicrobial Treatment vs. Outpatient Parenteral for Infective Endocarditis

PHASE4 · Fundacion Clinic per a la Recerca Biomédica · NCT05398679

This study is testing if taking oral antibiotics at home is just as effective as getting antibiotics through an IV for patients with left-sided infective endocarditis.

Quick facts

PhasePHASE4
Study typeInterventional
Enrollment360 (estimated)
Ages18 Years and up
SexAll
SponsorFundacion Clinic per a la Recerca Biomédica (other)
Locations20 sites (Alicante, Alicante and 19 other locations)
Trial IDNCT05398679 on ClinicalTrials.gov

What this trial studies

This trial is a non-inferiority study designed to evaluate whether a partial oral antibiotic treatment is as effective as outpatient parenteral antibiotic therapy (OPAT) for patients diagnosed with left-sided infective endocarditis. Participants will be randomized into two groups: one receiving oral antibiotics and the other receiving outpatient parenteral therapy after a minimum of 10 days of appropriate parenteral treatment. The goal is to demonstrate that oral therapy can maintain similar outcomes in terms of morbidity and mortality while potentially improving the quality of life and reducing costs for patients. The study will include patients who meet specific clinical criteria based on the modified Duke criteria.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 and older diagnosed with left-sided infective endocarditis who have received appropriate parenteral antibiotic treatment.

Not a fit: Patients with a body mass index over 40 or those requiring intravenous antibiotic therapy for concomitant infections may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a more convenient and cost-effective treatment option for patients with infective endocarditis.

How similar studies have performed: Other studies have explored outpatient parenteral therapy, but this specific comparison of oral antibiotics for infective endocarditis is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Left-sided native or prosthetic infective endocarditis based on the modified Duke criteria infected with one of the following nonresistant microorganisms: Non-resistant streptococci and other gram positive cocci,e.g., Granulicatella and Abiotrophia; Enterococcus faecalis; Staphylococcus aureus;coagulase-negative staphylococci and HACEK group.
* Male or female 18 years old or older.
* 10 days or more of appropriate parenteral antibiotic treatment overall and at least one week of appropriate parenteral treatment after value surgery.
* Temperature inferior to 38ºC for more than two days. 5. C-reactive protein dropped to \<25% of peak value or \<20 mg/l, and white blood cell count \<15x10\^9/l during antibiotic treatment
* Transthoracic / transesophageal echocardiography performed within 48 hours of randomization

Exclusion Criteria:

* Body mass index \>40
* Concomitant infection requiring intravenous antibiotic therapy
* Inability to give informed consent to participation
* Suspicion of reduced absorption of oral treatment due to abdominal disorder
* Microorganisms with no oral combinations for treatment (two active antibiotics of different families)
* Any immunosuppressive disease or any medical condition at the discretion of the investigator that may preclude oral or OPAT therapy
* No family or appropriate home support
* Reduced compliance
* Women of childbearing potential with a positive pregnancy test, or participants (male or female) who wish to plan a pregnancy during the trial period
* Women in lactancy period

Where this trial is running

Alicante, Alicante and 19 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.

View on ClinicalTrials.gov →

Conditions: Endocarditis Infective

Last reviewed 2026-05-15 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.