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Study of Ceftriaxone and Benzathine Penicillin G During Pregnancy

Phase IV Study of the Pharmacokinetics and Safety of Ceftriaxone and Benzathine Penicillin G During Pregnancy

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT07207876
Enrollment
110
Registered
2025-10-06
Start date
2026-02-16
Completion date
2027-05-17
Last updated
2026-03-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pregnancy

Keywords

Cefriaxone, Syphilis, Pregnancy, Benzathine Penicillin G

Brief summary

IMPAACT 2044 is a study to characterize the pharmacokinetics (PK) and safety of ceftriaxone and benzathine penicillin G during pregnancy. Up to 78 pregnant women receiving (1) ceftriaxone for indications other than syphilis or (2) benzathine penicillin G for treatment of syphilis from non-study clinical care providers will be enrolled at study sites located in the United States. Approximately 22 infants of pregnant participants receiving benzathine penicillin G will also be enrolled.

Detailed description

IMPAACT 2044 is a Phase IV, multi-site, open-label, non-randomized, opportunistic study to characterize the pharmacokinetics (PK) and safety of ceftriaxone and benzathine penicillin G during pregnancy. The study includes two arms, with Arm 1 subdivided by route of administration: Arm 1A: Intravenous (IV) ceftriaxone Arm 1B: Intramuscular (IM) ceftriaxone Arm 2: IM benzathine penicillin G

Interventions

Ceftriaxone will not be provided as part of the study. Pregnant participants will receive these drugs as prescribed outside the study by their non-study clinical care provider

Benzathine penicillin G will not be provided as part of the study. Pregnant participants will receive these drugs as prescribed outside the study by their non-study clinical care provider

Sponsors

International Maternal Pediatric Adolescent AIDS Clinical Trials Group
Lead SponsorNETWORK
National Institute of Allergy and Infectious Diseases (NIAID)
CollaboratorNIH
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
CollaboratorNIH
National Institute of Mental Health (NIMH)
CollaboratorNIH

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
FEMALE
Healthy volunteers
No

Inclusion criteria

* Is of legal age or circumstance to provide independent informed consent as determined by site standard operating procedures (SOPs) and consistent with Institutional Review Board (IRB) policies and procedures and is willing and able to provide written informed consent for her own and, if applicable (Arm 2), her infant's study participation * At screening, has a viable singleton intrauterine pregnancy of any gestational age confirmed by fetal ultrasound, as determined by the site investigator based on medical records, with trimester documented based on the best available obstetric estimate * At screening, is receiving or expected to receive one of the following drugs under study as prescribed by a clinical care provider and documented in medical records: * Ceftriaxone: IV or IM administration for an indication other than syphilis * Benzathine penicillin G: IM administration for treatment of syphilis * At entry, expects to remain in the geographic area of the study site during pregnancy and at least 30 days postpartum

Exclusion criteria

* Previously enrolled in this study * Requires desensitization to ceftriaxone or benzathine penicillin G as determined by the site investigator based on pregnant participant report and available medical records * Has any of the following as determined by the site investigator based on pregnant participant report and available medical records: * Current indication for hemodialysis * Current indication for intensive care unit hospitalization * Creatinine (Cr) ≥ 3.5 x upper limit of normal (ULN) at any time during the current pregnancy and/or chronic kidney disease Stage 5 * Receipt of any of the following prohibited medications within seven days prior to entry as determined by the site investigator based on pregnant participant report and available medical records: * Probenecid * Penicillin * Arm 1A: any penicillin * Arm 1B: any penicillin * Arm 2: penicillin other than benzathine penicillin G * Benzapril * Chlorpropamide * Diflunisal * Irbesartan * Ketoprofen * Ketorolac tromethamine * Meclofenamic acid * Mefenamic acid * Oxaprozin * Parecoxib * Penciclovir * Pioglitazone * Telmisartan * Valsartan * Receipt of any investigational agent within seven days prior to entry as determined by the site investigator based on pregnant participant report and available medical records * Has any documented or suspected clinically significant condition that, in the opinion of the site investigator, would make participation in the study unsafe, complicate interpretation of study outcome data, or otherwise interfere with achieving study objectives

Design outcomes

Primary

MeasureTime frameDescription
Geometric mean area under the curve (AUC) during the dosing interval (AUC0-tau) in the first trimester trimesterFirst on-study dose through 24 hoursArm 1A
Geometric mean terminal elimination half-life (t1/2) in the first trimesterFirst on-study dose through 24 hoursArm 1A
Geometric mean trough concentration (Ctrough) in the first trimesterFirst on-study dose through 24 hoursArm 1A
Geometric mean AUC0-tau in the second trimesterFirst on-study dose through 24 hoursArm 1A
Geometric mean t1/2 in the second trimesterFirst on-study dose through 24 hoursArm 1A
Geometric mean Ctrough in the second trimesterFirst on-study dose through 24 hoursArm 1A
Geometric mean AUC0-tau in the third trimesterFirst on-study dose through 24 hoursArm 1A
Geometric mean t1/2 in the third trimesterFirst on-study dose through 24 hoursArm 1A
Geometric mean Ctrough in the third trimesterFirst on-study dose through 24 hoursArm 1A
Median maximum plasma concentration during the dose interval (Cmax) in the first trimesterFirst on-study dose through up to 24 hoursArm 1B
Median time to Cmax (Tmax) in the first trimesterFirst on-study dose through up to 24 hoursArm 1B
Median Cmax in the second trimesterFirst on-study dose through up to 24 hoursArm 1B
Median Tmax in the second trimesterFirst on-study dose through up to 24 hoursArm 1B
Median Cmax in the third trimesterFirst on-study dose through up to 24 hoursArm 1B
Median Tmax in the third trimesterFirst on-study dose through up to 24 hoursArm 1B
Geometric mean AUC at 7 days (AUC 0-7d) in the first trimesterFirst on-study dose through 7 daysArm 2
Geometric mean AUC at 14 days (AUC0-14d) in the first trimesterFirst on-study dose through 14 daysArm 2
Geometric mean plasma concentration at 2 hours (C2h) in the first trimester2 hours post-first on-study doseArm 2
Geometric mean plasma concentration at 24 hours (C24h) in the first trimester24 hours post-first on-study doseArm 2
Geometric mean plasma concentration at 4 days (C4d) in the first trimester4 days post-first on-study doseArm 2
Geometric mean plasma concentration at 7 days (C7d) in the first trimester7 days post-first on-study doseArm 2
Geometric mean plasma concentration at 14 days (C14d) in the first trimester14 days post-first on-study doseArm 2
Geometric mean AUC0-7d in the second trimesterFirst on-study dose through 7 daysArm 2
Geometric mean AUC0-14d in the second trimesterFirst on-study dose through 14 daysArm 2
Geometric mean C2h in the second trimester2 hours post-first on-study doseArm 2 (as defined above)
Geometric mean C24h in the second trimester24 hours post-first on-study doseArm 2 (as defined above)
Geometric mean C4d in the second trimester4 days post-first on-study doseArm 2 (as defined above)
Geometric mean C7d in the second trimester7 days post-first on-study doseArm 2 (as defined above)
Geometric mean C14d in the second trimester14 days post-first on-study doseArm 2 (as defined above)
Geometric mean AUC0-7d in the third trimesterFirst on-study dose through 7 daysArm 2
Geometric mean AUC0-14d in the third trimesterFirst on-study dose through 14 daysArm 2
Geometric mean C2h in the third trimester2 hours post-first on-study doseArm 2 (as defined above)
Geometric mean C24h in the third trimester24 hours post-first on-study doseArm 2 (as defined above)
Geometric mean C4d in the third trimester4 days post-first on-study doseArm 2 (as defined above)
Geometric mean C7d in the third trimester7 days post-first on-study doseArm 2 (as defined above)
Geometric mean C14d in the third trimester14 days post-first on-study doseArm 2 (as defined above)

Secondary

MeasureTime frameDescription
Proportion of participants with a maternal serious adverse event (SAE)First on-study dose through 7 daysArm 1A and Arm 1B
Proportion of participants with a maternal SAE assessed as related to drug under studyFirst on-study dose through 7 daysArm 1A and Arm 1B
Proportion of participants with a maternal SAEFirst on-study dose through up to 28 daysArm 2
Proportion of participants with a spontaneous abortion or miscarriage (<20 weeks gestation)At pregnancy outcome/delivery/birthArm 1A, Arm1B, and Arm 2
Proportion of participants with a stillbirth (≥20 weeks gestation)At pregnancy outcome/delivery/birthArm 1A, Arm1B, and Arm 2
Proportion of participants with an infant small for gestational age (SGA; weight <10th percentile for gestational age, adjusted for sex)At pregnancy outcome/delivery/birthArm 1A, Arm1B, and Arm 2
Proportion of participants with a preterm birth (<37 weeks gestation)At pregnancy outcome/delivery/birthArm 1A, Arm1B, and Arm 2
Proportion of participants with an infant congenital anomaly consistent with the definition of defect provided by Metropolitan Atlanta Congenital Defects Program (MACDP)At pregnancy outcome/delivery/birthArm 1A, Arm1B, and Arm 2

Countries

Puerto Rico, United States

Contacts

CONTACTLisa Levy
impaact.ctgov@fstrf.org2028848480
STUDY_CHAIRJason Zucker

Columbia Physicians & Surgeons (P&S) CRS

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 28, 2026