The primary objectives of this study are:
* To assess the safety and tolerability of cefiderocol after single-dose administration in hospitalized paediatric participants 3 months to \< 18 years of age with suspected or confirmed aerobic Gram-negative bacterial infections
* To assess the pharmacokinetics (PK) of cefiderocol after single-dose administration of cefiderocol in hospitalized paediatric participants 3 months to \< 18 years of age with suspected or confirmed aerobic Gram-negative bacterial infections
* To assess the safety and tolerability of cefiderocol after multiple-dose administration in hospitalized paediatric participants 3 months to \< 12 years of age with suspected or confirmed aerobic Gram-negative bacterial infections
* To assess the PK of cefiderocol after multiple-dose administration in hospitalized paediatric participants 3 months to \< 12 years of age with suspected or confirmed aerobic Gram-negative bacterial infections
Who can participate
Age range
3 Months – 17 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Participant's parent(s) or legally authorized representative (LAR) provides written informed consent in accordance with regional and country-specific laws and regulations.
. Participant provides written informed assent, when feasible (age of assent to be determined by institutional review boards/independent ethics committees \[IRB's/IEC's\] or be consistent with local legal requirements).
. Hospitalized participant is 3 months to \<18 years of age at the time written informed consent/assent is obtained for the single-dose phase. Hospitalized participant is 3 months to \<12 years of age at the time written informed consent/assent is obtained for the multiple-dose phase. Premature babies will not be restricted, but the participant must have an adjusted or postnatal age of 3 months.
. Participant has a suspected or confirmed infection (including but not limited to complicated urinary tract infection \[cUTI\], complicated intra-abdominal infection \[cIAI\], hospital-acquired pneumonia \[HAP\] /ventilator-acquired pneumonia \[VAP\], sepsis, or bloodstream infections \[BSI\]) that requires hospitalization for treatment with IV antibiotics.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Single-Dose Phase: Number of Participants With Treatment-Emergent Adverse Events (TEAEs)
Timeframe: Day 1 up to Day 28
2
Multiple-Dose Phase: Number of Participants With TEAEs
Timeframe: Day 1 up to Day 42
3
Single Dose Phase: Maximum Observed Plasma Concentration (Cmax) of Cefiderocol
Timeframe: Up to 8 hours postdose
4
Single Dose Phase: Area Under the Plasma Concentration Time Curve Extrapolated From Time 0 to Infinity (AUCinf) of Cefiderocol
Timeframe: Up to 8 hours postdose
5
Single Dose Phase: Apparent Terminal Elimination Half-life (t1/2) of Cefiderocol
Timeframe: Up to 8 hours postdose
6
Multiple Dose Phase: Cmax of Cefiderocol
Timeframe: Up to 8 hours postdose
7
Multiple Dose Phase: Area Under the Plasma Concentration Time Curve Extrapolated From Time 0 to the Last Measurable Concentration (AUC0-t) of Cefiderocol
. If participant is a sexually active female of childbearing potential and has reached menarche or Tanner stage 3, participant agrees to use barrier contraception (including condom, diaphragm, or cervical cap) with spermicide or agrees to use a highly effective method of contraception (including contraceptive implant, injectable contraceptive, combination oral contraceptive, or an intrauterine \[IUD\] contraceptive device) from Screening up to 28 days after administration of the last dose of cefiderocol.
Exclusion criteria
. Participant has a documented history of any hypersensitivity or allergic reaction to any β-lactam antibiotic (Note: for β-lactams, a history of a mild rash followed by uneventful re-exposure is not a contraindication to enrollment).
. Multiple-dose only: Participant has an infection caused only by a confirmed Gram-positive pathogen.
. Participant has a suspected or confirmed central nervous system (CNS) infection (eg, meningitis, brain abscess, shunt infection) or osteomyelitis (which would require prolonged antibiotic therapy).
. Participant has cystic fibrosis.
. Single-dose phase: Participant has moderate or severe renal impairment based on estimated glomerular filtration rate (eGFR) (based on Schwartz equation if ≥ 3 months to \< 1 year of age and modified Bedside Schwartz equation if ≥ 1 to \< 18 years of age) of \< 60 milliliter (mL) per minute (min)/1.73 \^2² at Screening.
. Participant has end-stage renal disease (ESRD), is on hemodialysis (HD), or receiving continuous venovenous hemofiltration (CVVH).
. Participant has experienced shock in the prior month or is in shock at the time of Screening.
. Participant has severe neutropenia or is severely immunocompromised.