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Recruiting Phase 2 Interventional

Study of 2 Medicines (Aztreonam and Avibactam) Compared to Best Available Therapy for Serious Gram-negative Infections

ClinicalTrials.gov ID: NCT05639647

Public ClinicalTrials.gov record NCT05639647. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Oct 24, 2026, 7:34 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A PHASE 2A MULTICENTER, OBSERVER-BLINDED, RANDOMIZED 2 ARM STUDY TO INVESTIGATE PHARMACOKINETICS, SAFETY, TOLERABILITY AND EFFICACY OF INTRAVENOUS AZTREONAM-AVIBACTAM ± METRONIDAZOLE COMPARED TO BEST AVAILABLE THERAPY (BAT) IN PEDIATRIC PARTICIPANTS 9 MONTHS TO LESS THAN 18 YEARS OF AGE WITH SERIOUS GRAM-NEGATIVE BACTERIAL INFECTIONS INCLUDING COMPLICATED INTRA-ABDOMINAL INFECTION

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

The purpose of this study is to evaluate how Aztreonam (ATM) and Avibactam (AVI) are processed in pediatric participants. This study also aims to understand participant safety and effects in pediatric participants. The study is seeking participants who are: * 9 months to less than 18 years of age * Hospitalized * Suspected/known to have a gram-negative infection * Receiving intravenous (iv, given directly into a vein) antibiotics * Being treated for complicated infections of various body parts that includes the abdomen, urinary tract, blood stream, and lungs. * Participants will receive either ATM-AVI or best available therapy (BAT). * Both therapies will be given through a vein. * Participants with complicated abdominal infections will also receive iv Metronidazole (MTZ). Patients with cIAI and Cockayne Syndrome are excluded due to a risk of severe hepatotoxicity with the use of MTZ. - Participants on ATM-AVI treatment who have anaerobic infections will also receive iv MTZ at the study doctor's discretion. * The iv dose of ATM-AVI will be based on the participant's weight and kidney function. * The study doctor will determine the iv dose of BAT. * During the first 2 study days, participants on ATM-AVI therapy will have 5 blood draws in small quantities. * Starting on day 4, the study doctor will decide if participants may be switched to oral therapy. * Participants will receive a maximum of 14 days of ATM-AVI treatment. * After discharge from the hospital, 1 study visit may be required. * Depending on the participant's response, the study duration will be from 33 to 50 days. * The investigator will contact participants by phone 28 to 35 days after the last study treatment to check participants health status.

Study identification

NCT ID
NCT05639647
Recruitment status
Recruiting
Study type
Interventional
Phase
Phase 2
Lead sponsor
Pfizer
Industry
Enrollment
48 participants

Conditions and interventions

Interventions

Drug

Eligibility (public fields only)

Age range
9 Months to 17 Years
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Apr 18, 2023 (Actual)
Primary completion
Mar 31, 2027 (Estimated)
Completion
Mar 31, 2027 (Estimated)
Last update posted
Jul 1, 2026

2023 – 2027

United States locations

U.S. sites
3
U.S. states
2
U.S. cities
2
Facility City State ZIP Site status
Rady Children's Hospital San Diego California 92123 Recruiting
Weill Cornell Medicine-New York Presbyterian Hospital New York New York 10021 Recruiting
Icahn School of Medicine at Mount Sinai New York New York 10029 Recruiting

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 20 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT05639647, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Jul 1, 2026 · Synced Oct 24, 2026

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Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT05639647 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →