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Endovascular InfectionPhase 4COPATNCT05977868

Comparing Oral Versus Parenteral Antimicrobial Therapy

A Phase 4 study testing Amoxicillin, amoxicillin-clavulanate, cefadroxil, cefpodoxime, cefalexin, ciprofloxacin, delafloxacin, doxycycline, levofloxacin, linezolid and Ampicillin, ampicillin-sulbactam, cefazolin, cefepime, ceftaroline, ceftazidime, ceftazidime-avibactam, dalbavancin, daptomycin, ertapenem in people with Endovascular Infection and Bone and Joint Infection, run by West Virginia University at 1 site in United States.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

This is an investigator initiated multisite pragmatic randomized controlled trial designed to demonstrate equivalent effectiveness with improved safety of early transition from intravenous (IV) antimicrobial therapy to complex outpatient oral antimicrobial therapy (COpAT) across various infectious diseases… Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
Amoxicillin, amoxicillin-clavulanate, cefadroxil, cefpodoxime, cefalexin, ciprofloxacin, delafloxacin, doxycycline, levofloxacin, linezolid and Ampicillin, ampicillin-sulbactam, cefazolin, cefepime, ceftaroline, ceftazidime, ceftazidime-avibactam, dalbavancin, daptomycin, ertapenem
Could I receive a placebo?
No, everyone receives an active treatment
How many people
94 participants
Where
1 siteUnited States
Study dates
4 Aug 2023to 14 Feb 2025
Phase
Phase 4
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • English speaking
  • The patient is hospitalized at J.W. Ruby Memorial Hospital, United Hospital Center, Berkeley Medical Center, Wheeling Hospital, or Camden Clark Medical Center
  • The patient has been diagnosed with ≥ 1 of the following: endovascular, bone and joint, skin and soft tissue, pulmonary, gastrointestinal, or genitourinary infection
  • The patient is being transitioned to 2-8 weeks of IV antibacterial therapy on hospital discharge
  • The patient has capacity to participate in routine OPAT/COpAT follow-up (telephone check-ins, laboratory monitoring, and in-person or telemedicine ID Clinic follow-up)

Who cannot join

  • The patient is not appropriate for OPAT (active injection drug use, lack of infusion resources, and/or unstable outpatient environment)
  • The patient is not appropriate for COpAT (unable to receive PO medication or lack of an effective PO antimicrobial option based on susceptibility testing)
  • The patient is unable to give informed consent
  • The patient is a prisoner, pregnant, and/or mentally handicapped
  • The patient is determined unsafe for enrollment at the primary team's discretion

Trial locations and contacts

1 site in 1 country.

United States1 site
  • West Virginia University

    Morgantown, West Virginia, 26506

Other trials in United States

About this study

Official title: Comparing Oral Versus Parenteral Antimicrobial Therapy (COPAT) Trial

This is an investigator initiated multisite pragmatic randomized controlled trial designed to demonstrate equivalent effectiveness with improved safety of early transition from intravenous (IV) antimicrobial therapy to complex outpatient oral antimicrobial therapy (COpAT) across various infectious diseases (endovascular, bone and joint, skin and soft tissue, pulmonary, gastrointestinal, and genitourinary infections).

All patients referred for outpatient parenteral antimicrobial therapy (OPAT) will be evaluated by the research team with respect to inclusion/exclusion criteria. If determined eligible for enrollment, patients will be approached by a study investigator who will present the COPAT Trial. Once informed consent is obtained, patients will be randomized 2:1 using computer software into experimental or control (standard of care) group, respectively: Experimental: COpAT only on hospital discharge; Control: Conventional OPAT, OPAT transitioned to COpAT later in outpatient setting, or long-acting parenteral lipoglycopeptides. Both groups will be followed by an ID physician on the research team with in-person or telemedicine ID Clinic standard of care visits at 2, 6, and 12 weeks after hospital discharge. At the 6-week ID Clinic follow-up, patients will be asked to complete a patient satisfaction survey. The following 2 primary outcomes will be assessed: cure at 3 months using clinical (resolution of infection) and laboratory (improvement in inflammatory markers) parameters and adverse events related to antimicrobial therapy/vascular access complication or readmission at 3 months. The following secondary outcome will be assessed: patient satisfaction at 6 weeks. The experimental group is being compared to standard of care in current clinical practice.

As this is a pragmatic clinical trial, patients will not undergo additional invasive testing or procedures.

Being tested
Amoxicillin, amoxicillin-clavulanate, cefadroxil, cefpodoxime, cefalexin, ciprofloxacin, delafloxacin, doxycycline, levofloxacin, linezolid, Ampicillin, ampicillin-sulbactam, cefazolin, cefepime, ceftaroline, ceftazidime, ceftazidime-avibactam, dalbavancin, daptomycin, ertapenem
Keywords
COpAT, Oral antimicrobial therapy, OPAT, Parenteral antimicrobial therapy, Intravenous antimicrobial therapy, Implementation science
Medical subject headings
Soft Tissue Infections

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Amoxicillin, amoxicillin-clavulanate, cefadroxil, cefpodoxime, cefalexin, ciprofloxacin, delafloxacin, doxycycline, levofloxacin, linezolidDrug

    Also called metronidazole, moxifloxacin, rifampin, trimethoprim-sulfamethoxazole

    COpAT (oral antimicrobial therapy) on hospital discharge

  • Ampicillin, ampicillin-sulbactam, cefazolin, cefepime, ceftaroline, ceftazidime, ceftazidime-avibactam, dalbavancin, daptomycin, ertapenemDrug

    Also called meropenem, oritavancin, oxacillin, penicillin, piperacillin-tazobactam, tigecycline, vancomycin

    Standard of care (IV antimicrobial therapy) on hospital discharge

Study groups in NCT05977868
Study groupRoleWhat they receive
Group 1 (Experimental)ExperimentalCOpAT (oral antimicrobial therapy) on hospital discharge
Receives: Drug: Amoxicillin, amoxicillin-clavulanate, cefadroxil, cefpodoxime, cefalexin, ciprofloxacin, delafloxacin, doxycycline, levofloxacin, linezolid
Group 2 (Control)Active comparatorStandard of care (IV antimicrobial therapy) on hospital discharge
Receives: Drug: Ampicillin, ampicillin-sulbactam, cefazolin, cefepime, ceftaroline, ceftazidime, ceftazidime-avibactam, dalbavancin, daptomycin, ertapenem

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Cure/Control at 3 Months

    Number of patients with cure/control using clinical (resolution of infection - e.g., wound healed) and laboratory (improvement in inflammatory markers - e.g., CRP normalization) parameters as adjudicated by 2 ID faculty blinded to study arm

    Measured: 3 months after hospital discharge

  2. Adverse Events Related to Antimicrobial Therapy

    Number of participants with adverse events requiring intervention related to antimicrobial therapy (e.g., thrombocytopenia)

    Measured: Up to 3 months after hospital discharge

  3. Adverse Events Related to Vascular Access

    Number of participants with adverse events requiring intervention related to vascular access complication (e.g., deep venous thrombosis)

    Measured: Up to 3 months after hospital discharge

  4. Overall Readmission

    Number of participants readmitted for any reason up to 3 months after discharge from the hospital

    Measured: Up to 3 months after hospital discharge

Secondary outcomes (2)
  1. Number of Participants Reporting 'Satisfied' or 'Very Satisfied' on Patient Satisfaction Survey

    Patient satisfaction using the COPAT Trial Patient Satisfaction Survey at 6 Weeks, which is a short questionnaire (with the overall satisfaction question incorporating a Likert scale 1= Very Dissatisfied, 5= Very Satisfied) designed to assess overall patient satisfaction. Overall satisfaction totaled from participants answering 4= Satisfied and 5= Very Satisfied.

    Measured: 6 weeks after hospital discharge

  2. Number of Participants Who Answered 'Yes' to the Survey Question "Would You Have Preferred to be in the Other Study Arm? (Yes or No)"

    The number of participants who expressed a preference to be in the other study arm (i.e., answers 'Yes' to the survey question "Would you have preferred to be in the other study arm? Yes or No").

    Measured: 6 weeks after hospital discharge

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted7 Aug 2023
  2. Study start4 Aug 2023
  3. Primary completion14 Feb 2025
  4. Study completion14 Feb 2025

Why it stopped: DSMB recommendation based on safety benefit in Experimental (oral) arm

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
94 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05977868
Sponsor's protocol ID
2304754420
Acronym
COPAT
Status last verified
Aug 2025
First submitted
14 Jul 2023
Last updated
26 Aug 2025
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Iversen K, Ihlemann N, Gill SU, Madsen T, Elming H, Jensen KT, Bruun NE, Hofsten DE, Fursted K, Christensen JJ, Schultz M, Klein CF, Fosboll EL, Rosenvinge F, Schonheyder HC, Kober L, Torp-Pedersen C, Helweg-Larsen J, Tonder N, Moser C, Bundgaard H. Partial Oral versus Intravenous Antibiotic Treatment of Endocarditis. N Engl J Med. 2019 Jan 31;380(5):415-424. doi: 10.1056/NEJMoa1808312. Epub 2018 Aug 28.

    PubMed 30152252
  • Li HK, Rombach I, Zambellas R, Walker AS, McNally MA, Atkins BL, Lipsky BA, Hughes HC, Bose D, Kumin M, Scarborough C, Matthews PC, Brent AJ, Lomas J, Gundle R, Rogers M, Taylor A, Angus B, Byren I, Berendt AR, Warren S, Fitzgerald FE, Mack DJF, Hopkins S, Folb J, Reynolds HE, Moore E, Marshall J, Jenkins N, Moran CE, Woodhouse AF, Stafford S, Seaton RA, Vallance C, Hemsley CJ, Bisnauthsing K, Sandoe JAT, Aggarwal I, Ellis SC, Bunn DJ, Sutherland RK, Barlow G, Cooper C, Geue C, McMeekin N, Briggs AH, Sendi P, Khatamzas E, Wangrangsimakul T, Wong THN, Barrett LK, Alvand A, Old CF, Bostock J, Paul J, Cooke G, Thwaites GE, Bejon P, Scarborough M; OVIVA Trial Collaborators. Oral versus Intravenous Antibiotics for Bone and Joint Infection. N Engl J Med. 2019 Jan 31;380(5):425-436. doi: 10.1056/NEJMoa1710926.

    PubMed 30699315
  • Pries-Heje MM, Wiingaard C, Ihlemann N, Gill SU, Bruun NE, Elming H, Povlsen JA, Madsen T, Jensen KT, Fursted K, Schultz M, Ostergaard L, Christensen JJ, Christiansen U, Rosenvinge F, Helweg-Larsen J, Fosbol EL, Kober L, Torp-Pedersen C, Tonder N, Moser C, Iversen K, Bundgaard H. Five-Year Outcomes of the Partial Oral Treatment of Endocarditis (POET) Trial. N Engl J Med. 2022 Feb 10;386(6):601-602. doi: 10.1056/NEJMc2114046. No abstract available.

    PubMed 35139280
  • Staples JA, Ho M, Ferris D, Hayek J, Liu G, Tran KC, Sutherland JM. Outpatient Versus Inpatient Intravenous Antimicrobial Therapy: A Population-Based Observational Cohort Study of Adverse Events and Costs. Clin Infect Dis. 2022 Nov 30;75(11):1921-1929. doi: 10.1093/cid/ciac298.

    PubMed 35439822
  • Rivera CG, Mehta M, Ryan KL, Stevens RW, Tucker KJ, Mahoney MV. Role of infectious diseases pharmacists in outpatient intravenous and complex oral antimicrobial therapy: Society of Infectious Diseases Pharmacists insights. J Am Coll Clin Pharm. 2021;4:1161-1169. doi: 10.1002/jac5.1473

  • Juskowich JJ, Ward A, Spigelmyer AE, Howard CA, Slain D, Guilfoose JA, Edmond MB, Sarwari AR. Complex Outpatient Oral Antimicrobial Therapy (COpAT) Program at a Rural Academic Medical Center: Evaluation of First 100 Patients. Open Forum Infect Dis. 2022; 9(2): S418-S419. doi: 10.1093/ofid/ofac492.843

  • Freling S, Wald-Dickler N, Banerjee J, Canamar CP, Tangpraphaphorn S, Bruce D, Davar K, Dominguez F, Norwitz D, Krishnamurthi G, Fung L, Guanzon A, Minejima E, Spellberg M, Spellberg C, Baden R, Holtom P, Spellberg B. Real-World Application of Oral Therapy for Infective Endocarditis: A Multicenter, Retrospective, Cohort Study. Clin Infect Dis. 2023 Sep 11;77(5):672-679. doi: 10.1093/cid/ciad119.

    PubMed 36881940
  • Juskowich JJ, Thompson JM, Bage SD, Palmateer KM, Guilfoose JA, Lastinger AM, Smith CL, Arcega VA, Stanley JE, Summerfield HM, Fisher-Duda C, Nepal M, Wen S, Sarwari AR. Using the Comparing Oral versus Parenteral Antimicrobial Therapy (COPAT) Clinical Trial to Influence Institutional Practice Transformation Towards Earlier Transition to Oral Antibiotics. Clin Infect Dis. 2026 Apr 30;82(4):e674-e681. doi: 10.1093/cid/ciaf707.

    PubMed 41419216

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing Amoxicillin, amoxicillin-clavulanate, cefadroxil, cefpodoxime, cefalexin, ciprofloxacin, delafloxacin, doxycycline, levofloxacin, linezolid and Ampicillin, ampicillin-sulbactam, cefazolin, cefepime, ceftaroline, ceftazidime, ceftazidime-avibactam, dalbavancin, daptomycin, ertapenem in people with Endovascular Infection and Bone and Joint Infection, run by West Virginia University at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 26 Aug 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 26 Aug 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Cure/Control at 3 Months (time frame: 3 months after hospital discharge). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05977868, which also lists 8 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 Aug 2025.

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