CClinicalTrials.gg
CompletedNCT01222585PTN_METROUpdated Feb 6, 2014Results posted

Metronidazole Pharmacokinetics (PK) in Premature Infants

A Phase 1 interventional study of Metronidazole in Serious Systemic Infections and Necrotizing Enterocolitis, sponsored by Michael Cohen-Wolkowiez. Completed at 3 sites in United States. Open to participants aged Up to 90 Days. Per ClinicalTrials.gov, last updated 2014-02-06.

Sponsored by Michael Cohen-Wolkowiez · Phase 1, Interventional, and Treatment

Phase
Phase 1
Study type
Interventional
Enrollment
24
Allocation
Not applicable
Ages
Up to 90 Days
Sex
All
01

Study summary

Yearly in the United States over 500,000 newborns are delivered prematurely. This population is at high risk of catastrophic bowel disease known as necrotizing enterocolitis. Infants with necrotizing enterocolitis are at high risk of death, and survivors are at increased risk of mental retardation. Metronidazole is an antibiotic that is often administered to infants with suspected or confirmed necrotizing enterocolitis. Unfortunately, the appropriate dose of metronidazole in premature infants has not been established and it is likely to be different from older children and adults.

The investigators will investigate the appropriate metronidazole dose in very premature infants by: 1) determining how premature infants eliminate metronidazole from the body and 2) determining the safest and most effective dose of metronidazole in premature infants.

The investigators hypothesis are: 1) The rate of removal of metronidazole will increase with infant maturity and 2) an appropriate metronidazole dosing regimen will result in necessary drug levels to treat bacteria involved in necrotizing enterocolitis.

02

Conditions studied

  • Serious Systemic Infections
  • Necrotizing Enterocolitis

Keywords

  • Metronidazole
  • Neonate
  • Premature
  • Sepsis
  • Necrotizing enterocolitis
03

In context

Sepsis

1,899 studies on the registry are indexed under Sepsis; 462 are open to participants now.

This study's enrollment of 24 is below the median of 105 across 896 interventional studies indexed under Sepsis.

Browse Sepsis studies →

Lead sponsor

Michael Cohen-Wolkowiez is the lead sponsor of 5 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Up to 90 Days
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Gestational age \<32 weeks at the time of enrollment.
  • Postnatal age \<91 days at the time of enrollment.
  • Sufficient venous access to permit administration of study medication.
  • Infant suspected to have a serious infection and from whom a blood culture has been obtained within 96 hours of study entry.

Exclusion criteria

Exclusion Criteria:

  • History of anaphylaxis to metronidazole or other nitroimidazole derivatives (e.g., tinidazole).
  • Previous exposure to metronidazole in the week prior to study.
  • Previous participation in the study.
05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
24 participants (actual)

Study arms

  • Experimental
    Treatment

    Intravenous metronidazole loading dose 15 mg/kg followed by 7.5 mg/kg every 12-24 hours

    Drug: Metronidazole

Interventions

  • DrugMetronidazole

    Metronidazole will be administered intravenously to premature infants as a 15 mg/kg loading dose followed by maintenance doses of 7.5 mg/kg every 12 hours for infants with \>=14 postnatal days and every 24 hours for infants \<14 postnatal days.

    Also known as: Flagyl

06

What researchers measure

Primary outcomes

  1. Area Under the Curve at Steady State

    Area under the curve at steady state (AUCss)

    Time frame: pre-dose: 30 min; post-dose:10 min, 3-4,6-8, 12-13, 24-25, 36-37, 48-49, 72-73 hours post dose

  2. Loading Dose Maximum Concentration

    Loading Dose Maximum concentration (Cmax)

    Time frame: 2-5 days of study drug administration

  3. Loading Dose Minimum Concentration

    Loading Dose Minimum Concentration (mg/L)

    Time frame: 2-5 days of study drug administration

  4. Multiple Dose Maximum Concentration

    Multiple Dose Maximum Concentration (mg/L)

    Time frame: 2-5 days of study drug administration

  5. Multiple Dose Minimum Concentration

    Multiple Dose Minimum Concentration (mg/L)

    Time frame: 2-5 days of study drug administration

  6. Clearance

    Clearance (L/h/kg)

    Time frame: 2-5 days of study drug administration

  7. Volume of Distribution

    Volume of Distribution (L/kg)

    Time frame: 2-5 days of study drug administration

07

Results

Posted Dec 18, 2013

Participant flow

Participant flow — Overall Study
MilestoneMetronidazole IV
Started24
Completed24
Not completed0

Outcome measures

PrimaryArea Under the Curve at Steady State

Area under the curve at steady state (AUCss)

Time frame:
pre-dose: 30 min; post-dose:10 min, 3-4,6-8, 12-13, 24-25, 36-37, 48-49, 72-73 hours post dose
Reported as:
Median · mg*hr/L
Area Under the Curve at Steady State
mg*hr/LMetronidazole IV
Area Under the Curve at Steady State178.0 (66.0 to 472.0)
PrimaryLoading Dose Maximum Concentration

Loading Dose Maximum concentration (Cmax)

Time frame:
2-5 days of study drug administration
Reported as:
Median · mg/L
Loading Dose Maximum Concentration
mg/LMetronidazole IV
Loading Dose Maximum Concentration16.54 (9.18 to 19.63)
PrimaryLoading Dose Minimum Concentration

Loading Dose Minimum Concentration (mg/L)

Time frame:
2-5 days of study drug administration
Reported as:
Median · mg/L
Loading Dose Minimum Concentration
mg/LMetronidazole IV
Loading Dose Minimum Concentration9.20 (3.21 to 12.82)
PrimaryMultiple Dose Maximum Concentration

Multiple Dose Maximum Concentration (mg/L)

Time frame:
2-5 days of study drug administration
Reported as:
Median · mg/L
Multiple Dose Maximum Concentration
mg/LMetronidazole IV
Multiple Dose Maximum Concentration16.51 (8.71 to 34.05)
PrimaryMultiple Dose Minimum Concentration

Multiple Dose Minimum Concentration (mg/L)

Time frame:
2-5 days of study drug administration
Reported as:
Median · mg/L
Multiple Dose Minimum Concentration
mg/LMetronidazole IV
Multiple Dose Minimum Concentration11.62 (1.29 to 27.05)
PrimaryClearance

Clearance (L/h/kg)

Time frame:
2-5 days of study drug administration
Reported as:
Median · L/h/kg
Clearance
L/h/kgMetronidazole IV
Clearance0.043 (0.016 to 0.105)
PrimaryVolume of Distribution

Volume of Distribution (L/kg)

Time frame:
2-5 days of study drug administration
Reported as:
Median · L/kg
Volume of Distribution
L/kgMetronidazole IV
Volume of Distribution0.99 (0.38 to 2.67)

Adverse events

Collected over From first dose through 10 days post dose.. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Treatment—5/24 (20.8%)17/24 (70.8%)
Most frequent serious events
Most frequent serious events
EventTreatment
Necrotising colitisGastrointestinal disorders2/24
DeathGeneral disorders1/24
Cardiac arrestCardiac disorders1/24
Patent ductus arteriosus repairSurgical and medical procedures1/24
Septic shockInfections and infestations1/24
Renal failure acuteRenal and urinary disorders1/24
Most frequent other events
Most frequent other events
EventTreatment
Other non-serious, infrequent adverse eventsGeneral disorders7/24
Endocrine disorders Adrenal InsufficiencyEndocrine disorders4/24
ConvulsionNervous system disorders3/24
Dermatitis diaperSkin and subcutaneous tissue disorders3/24

Baseline characteristics

Age, Continuous
Age, Continuous(days)Treatment
Median27 (1 to 82)
Age, Continuous
Age, Continuous(weeks)Treatment
Mean25 (23 to 31)
Sex: Female, Male
Sex: Female, Male(Participants)Treatment
Female16
Male8
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Treatment
Hispanic or Latino6
Not Hispanic or Latino18
Unknown or Not Reported0
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Treatment
American Indian or Alaska Native0
Asian0
Native Hawaiian or Other Pacific Islander1
Black or African American7
White16
More than one race0
Unknown or Not Reported0
Region of Enrollment
Region of Enrollment(participants)Treatment
United States24
Birth Weight
Birth Weight(grams)Treatment
Median740 (431 to 1466)
08

Study locations

3 sites
  • CHOC Children's
    Orange, California 92868, United States
  • Wesely Medical Center
    Wichita, Kansas 67214, United States
  • Duke University
    Durham, North Carolina 27715, United States
09

References and documents

Publications

  • Cohen-Wolkowiez M, Sampson M, Bloom BT, Arrieta A, Wynn JL, Martz K, Harper B, Kearns GL, Capparelli EV, Siegel D, Benjamin DK Jr, Smith PB; Best Pharmaceuticals for Children Act-Pediatric Trials Network. Determining population and developmental pharmacokinetics of metronidazole using plasma and dried blood spot samples from premature infants. Pediatr Infect Dis J. 2013 Sep;32(9):956-61. doi: 10.1097/INF.0b013e3182947cf8. PubMed 23587979 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 6, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT01222585
Lead sponsor
Michael Cohen-Wolkowiez
Collaborators
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), The Emmes Company, LLC
Responsible party
Michael Cohen-Wolkowiez (Assistant Professor of Pediatrics, Duke University) — Sponsor-investigator
First posted
Oct 18, 2010
Start date
Jan 2011
Primary completion
Nov 2011
Completion
Nov 2011
Results posted
Dec 18, 2013
Last update
Feb 6, 2014

Study contacts

Michael Cohen-wolkowiez, MD
principal investigator · Duke University

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jan 2014. You cannot join it, but the record below documents what was studied.

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