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Oral Sulopenem Versus Amoxicillin/Clavulanate for Uncomplicated Urinary Tract Infection in Adult Women

A Prospective, Phase 3, Randomized, Multi-center, Double-blind Study of the Efficacy, Tolerability, and Safety of Oral Sulopenem Etzadroxil/Probenecid Versus Oral Amoxicillin/Clavulanate for Treatment of Uncomplicated Urinary Tract Infections (uUTI) in Adult Women

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05584657
Acronym
REASSURE
Enrollment
2229
Registered
2022-10-18
Start date
2022-10-18
Completion date
2023-11-21
Last updated
2024-11-20

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

Conditions

Urinary Tract Infections, Cystitis

Brief summary

Study 310 is a clinical study which compares the effectiveness of oral sulopenem versus oral amoxicillin/clavulanate for the treatment of adult women with uncomplicated urinary tract infection.

Detailed description

IT001-310 is a Phase 3, randomized, multicenter, double-blind, double dummy, controlled study to compare oral sulopenem etzadroxil/probenecid (oral sulopenem) to oral amoxicillin/clavulanate for the treatment of adult female patients with uncomplicated urinary tract infection. Approximately 1966 adult women with uncomplicated urinary tract infection will be randomized in a 1:1 fashion to receive either oral sulopenem etzadroxil/probenecid or oral amoxicillin/clavulanate twice daily for 5 days. The primary outcome measure for efficacy evaluation will be the overall success (combined clinical and microbiologic success) on Day 12 (± 1 day)/Test of Cure (TOC).

Interventions

Oral sulopenem twice daily for 5 days

Oral Augmentin twice daily for 5 days

Sponsors

Iterum Therapeutics, International Limited
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Female patients ≥18 years of age with ≥24 hours and ≤96 hours of urinary symptoms attributable to a UTI * Two of the following signs and symptoms of uUTI: urinary frequency, urinary urgency, pain or burning on micturition, suprapubic pain. * A mid-stream urine specimen with evidence of pyuria as defined by either a machine-read dipstick positive for leukocyte esterase OR at least 10 white blood cells per cubic millimeter on microscopic analysis of unspun urine OR white blood cell count ≥10 cells/high-powered field (HPF) in the sediment of a spun urine

Exclusion criteria

* Presence of signs and symptoms suggestive of acute pyelonephritis defined as: fever (temperature \> 38° Celsius), chills, costovertebral angle tenderness, flank pain, nausea, and/or vomiting * Receipt of antibacterial drug therapy potentially effective as treatment of uUTI within the prior 7 days * Concurrent use of non-study treatments that would have a potential effect on outcome evaluations in patients with uUTI, including analgesics (e.g., non-steroidal anti-inflammatory drugs, aspirin, paracetamol etc.), phenazopyridine, and cranberry products. * Any anatomical abnormality of the urinary tract, including surgically modified urinary tract anatomy, and obstructive uropathy due to nephrolithiasis, stricture, tumor, or fibrosis * Ongoing urinary retention * Neurogenic bladder * Current resident of a long-term care facility * Instrumentation of urinary tract in the previous 30 days * An indwelling urinary catheter, ureteral stent or other foreign material in the urinary tract * Any history of trauma to the pelvis or urinary tract * Receiving hemodialysis, hemofiltration, peritoneal dialysis, or had a renal transplant * History of allergy or hypersensitivity to carbapenems, β-lactams or probenecid, as formulated with their excipients

Design outcomes

Primary

MeasureTime frameDescription
Overall SuccessDay 12+/-1 dayClinical Success (resolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms) AND Microbiologic success (eradication of the baseline pathogen)
Overall Success Susceptible PopulationDay 12+/-1 dayClinical Success (resolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms) AND Microbiologic success (eradication of the baseline pathogen)

Secondary

MeasureTime frameDescription
Clinical Success Susceptible PopulationDay 12+/-1 dayResolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms
Clinical Success Modified Intent-to-treat PopulationDay 12+/-1 dayResolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms
Microbiologic Success Susceptible PopulationDay 12+/-1 dayMicrobiologic Success: Eradication of the Baseline Pathogen
Microbiologic SuccessDay 12+/-1 dayEradication of the Baseline Pathogen
Clinical SuccessDay 12+/-1 dayResolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms

Countries

United States

Participant flow

Participants by arm

ArmCount
Sulopenem Etzadroxil/Probenecid
Sulopenem etzadroxil/probenecid 500 mg/500 mg PO twice daily for 5 days Sulopenem etzadroxil/probenecid: Oral sulopenem twice daily for 5 days
522
Amoxicillin/Clavulanate
Amoxicillin/clavulanate 875 mg/125 mg PO twice daily for 5 days Amoxicillin/clavulanate: Oral Augmentin twice daily for 5 days
468
Total990

Baseline characteristics

CharacteristicSulopenem Etzadroxil/ProbenecidAmoxicillin/ClavulanateTotal
Age, Continuous50.3 years
STANDARD_DEVIATION 17.31
48.6 years
STANDARD_DEVIATION 17.18
49.5 years
STANDARD_DEVIATION 17.26
Diabetes86 Participants68 Participants154 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
333 Participants296 Participants629 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
189 Participants171 Participants360 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants1 Participants1 Participants
Race (NIH/OMB)
American Indian or Alaska Native
1 Participants1 Participants2 Participants
Race (NIH/OMB)
Asian
10 Participants8 Participants18 Participants
Race (NIH/OMB)
Black or African American
84 Participants84 Participants168 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants1 Participants1 Participants
Race (NIH/OMB)
Unknown or Not Reported
8 Participants4 Participants12 Participants
Race (NIH/OMB)
White
419 Participants370 Participants789 Participants
Region of Enrollment
United States
522 participants468 participants990 participants
Sex: Female, Male
Female
522 Participants468 Participants990 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 1,1070 / 1,107
other
Total, other adverse events
198 / 1,107118 / 1,107
serious
Total, serious adverse events
0 / 1,1075 / 1,107

Outcome results

Primary

Overall Success

Clinical Success (resolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms) AND Microbiologic success (eradication of the baseline pathogen)

Time frame: Day 12+/-1 day

Population: Microbiologic Modified Intent to Treat Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Sulopenem Etzadroxil/ProbenecidOverall Success318 Participants
Amoxicillin/ClavulanateOverall Success260 Participants
Primary

Overall Success Susceptible Population

Clinical Success (resolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms) AND Microbiologic success (eradication of the baseline pathogen)

Time frame: Day 12+/-1 day

Population: Microbiological Modified intent-to-treat Susceptible Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Sulopenem Etzadroxil/ProbenecidOverall Success Susceptible Population296 Participants
Amoxicillin/ClavulanateOverall Success Susceptible Population243 Participants
Secondary

Clinical Success

Resolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms

Time frame: Day 12+/-1 day

Population: Microbiological Modified Intent-to-treat Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Sulopenem Etzadroxil/ProbenecidClinical Success397 Participants
Amoxicillin/ClavulanateClinical Success358 Participants
Secondary

Clinical Success Modified Intent-to-treat Population

Resolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms

Time frame: Day 12+/-1 day

Population: Modified Intent-to-treat Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Sulopenem Etzadroxil/ProbenecidClinical Success Modified Intent-to-treat Population851 Participants
Amoxicillin/ClavulanateClinical Success Modified Intent-to-treat Population849 Participants
Secondary

Clinical Success Susceptible Population

Resolution of uncomplicated urinary tract infection (uUTI) symptoms present at study entry and no new symptoms

Time frame: Day 12+/-1 day

Population: Microbiological Modified Intent-to-treat Susceptible Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Sulopenem Etzadroxil/ProbenecidClinical Success Susceptible Population371 Participants
Amoxicillin/ClavulanateClinical Success Susceptible Population339 Participants
Secondary

Microbiologic Success

Eradication of the Baseline Pathogen

Time frame: Day 12+/-1 day

Population: Microbiological Modified Intent-to-treat Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Sulopenem Etzadroxil/ProbenecidMicrobiologic Success390 Participants
Amoxicillin/ClavulanateMicrobiologic Success315 Participants
Secondary

Microbiologic Success Susceptible Population

Microbiologic Success: Eradication of the Baseline Pathogen

Time frame: Day 12+/-1 day

Population: Microbiological Modified Intent-to-treat Susceptible Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Sulopenem Etzadroxil/ProbenecidMicrobiologic Success Susceptible Population361 Participants
Amoxicillin/ClavulanateMicrobiologic Success Susceptible Population295 Participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026