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Fexinidazole

Phase 1

Hepatic Function Abnormal | Small molecule | Gastrointestinal |Sanofi|Last Updated: Sep 19, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
CONTROLLEDBiomarker
Total Trials1
Total Enrollment21
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05607173A Pharmacokinetic and Tolerability Study of Fexinidazole in a Single Oral Dose in Adult Participants With Mild and Moderate Hepatic ImpairmentPHASE1 COMPLETED 21Jan 18, 2023May 3, 2023Sep 19, 20252 Bulgaria, France
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Study Endpoints
Primary Endpoints
Cmax for fexinidazole and metabolites M1, M2
Day 1 to Day 6

Maximum plasma concentration observed (Cmax)

AUC for fexinidazole and metabolites M1, M2
Day 1 to Day 6

Area under the plasma concentration versus time curve extrapolated to infinity (AUC)

Secondary Endpoints
tmax for fexinidazole and metabolites M1, M2
Day 1 to Day 6
Fexinidazole unbound fraction
Day 1 and Day 2
Fexinidazole unbound Cmaxu
Day 1 and Day 6
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeOTHER
Treatment Arms
ArmTypeDescription
Participants with mild HIEXPERIMENTALMild HI is defined as a total score ranging from 5 to 6, inclusive (Child-Pugh score A)
Participants with moderate HIEXPERIMENTALModerate HI is defined as a total score ranging from 7 to 9, inclusive (Child-Pugh score B)
Participants with normal hepatic functionEXPERIMENTALParticipants with normal hepatic function matched to participants
Interventions
NameTypeDescription
Fexinidazole (HOE239)DRUGRoute of administration: oral; pharmaceutical form: tablet
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersYes
Study Sites2

Inclusion Criteria: * Male or female participants, between 18 and 75 years of age, inclusive * 12-lead ECG without clinically significant abnormality, in the judgment of the Investigator; normal QT interval confirmed * Contraception (with double contraception methods) for male and female (unless po...

Countries:BulgariaFrance
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