Clinical Trials

Multiple clinical trials spanning Phase 1 through Phase 3 evaluate fexinidazole for neglected tropical infectious diseases, primarily human African trypanosomiasis and Chagas disease, as well as pharmacokinetic profiles in healthy and hepatic-impaired cohorts. Sponsored independently or jointly by entities such as Sanofi and the Drugs for Neglected Diseases initiative, these studies evaluate safety, dosing regimens, and food effects. While most trials have reached completed status, select studies in challenging environments were ultimately withdrawn or terminated.

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT05645822 Withdrawn
Sleeping Sickness|Trypanosomiasis African
Institute of Tropical Medicine Belgium|Ministry of Public Health Democratic Republic of the Congo|Institut National de Recherche Biomédicale. Kinshasa République Démocratique du Congo|SANRU Asbl Soins de Santé Primaires en Milieu Rural République Démocratique du Congo|Drugs for Neglected Diseases
2024-01-01 --
NCT05607173 COMPLETED
Hepatic Function Abnormal
Sanofi
2023-01-18 PHASE1
NCT05607173 Completed
Hepatic Function Abnormal
Sanofi
2023-01-18 Phase 1
NCT03974178 COMPLETED
Trypanosomiasis, African; Sleeping Sickness; Trypanosoma Brucei Rhodesiense; Infection
Drugs for Neglected Diseases
2019-09-29 PHASE2; PHASE3
NCT03025789 COMPLETED
Trypanosomiasis, African; Sleeping Sickness; Trypanosomiasis; Gambian
Drugs for Neglected Diseases
2016-11-10 PHASE3
NCT03587766 COMPLETED
Chagas' Disease (Chronic) Nos
Drugs for Neglected Diseases
2017-11-13 PHASE2
NCT03587766 Completed
Chagas'' Disease (Chronic) Nos
Drugs for Neglected Diseases
2017-11-13 Phase 2
NCT02184689 COMPLETED
Human African Trypanosomiasis (HAT)
Drugs for Neglected Diseases
2014-05-03 PHASE2; PHASE3
NCT01685827 COMPLETED
Human African Trypanosomiasis (HAT); Sleeping Sickness
Drugs for Neglected Diseases
2012-10 PHASE2; PHASE3
NCT03025789 Completed
Trypanosomiasis African|Sleeping Sickness|Trypanosomiasis; Gambian
Drugs for Neglected Diseases|Sanofi
2016-11-10 Phase 3
NCT02169557 COMPLETED
Human African Trypanosomiasis (HAT)
Drugs for Neglected Diseases
2014-04-30 PHASE2; PHASE3
NCT02498782 UNKNOWN
Chagas Disease; Trypanosomiasis, South American; South American Trypanosomiasis; Disease, Chagas
Drugs for Neglected Diseases
2014-07 PHASE2
NCT02571062 COMPLETED
Trypanosomiasis, African
Drugs for Neglected Diseases
2015-03 PHASE1
NCT02571062 Completed
Trypanosomiasis African
Drugs for Neglected Diseases
2015-03 Phase 1
NCT01980199 TERMINATED
Visceral Leishmaniasis
Drugs for Neglected Diseases
2013-11 PHASE2
NCT01483170 TERMINATED
Trypanosomiasis, African
Drugs for Neglected Diseases
2011-09 PHASE1
NCT01340157 COMPLETED
PK in Healthy Volunteers
Drugs for Neglected Diseases
2011-02 PHASE1
NCT01340157 Completed
PK in Healthy Volunteers
Drugs for Neglected Diseases|Sanofi
2011-02 Phase 1
NCT00982904 COMPLETED
Human African Trypanosomiasis
Drugs for Neglected Diseases
2009-09 PHASE1

(data from https://clinicaltrials.gov, updated on 2024-05-22)

Check the Fexinidazole product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Compliance for Clinical Use

Mechanism and Biochemical Profile

As a 5-nitroimidazole derivative, fexinidazole acts as a DNA synthesis inhibitor that undergoes bioactivation to yield reactive intermediates that disrupt protozoal nucleic acid replication. This biochemical interference causes extensive intracellular parasite DNA damage, resulting in effective pathogen clearance and cytotoxic death. Consequently, this antiparasitic mechanism provides the biological basis for its therapeutic use in treating human African trypanosomiasis and Chagas disease.

Appendix RUO and cGMP Quality Standards

Quality Dimension RUO (Research Use Only) cGMP (Current Good Manufacturing Practice)
Clinical Applicability Prohibited in human clinical trials or medical diagnostics. Mandatory for human clinical trials (Phase I–III) and therapies.
Regulatory Status Non-regulated grade; exempt from drug manufacturing laws. Legally enforced by health authorities (e.g., FDA, EMA, NMPA).
Facility Environment Unclassified analytical or research laboratories. Validated Cleanrooms (ISO Class 5–8) with continuous monitoring.
Quality Control Basic purity and activity testing. Rigorous safety release testing (Sterility, Endotoxin, Mycoplasma).
Process Validation Basic equipment calibration; no process validation required. Full qualification (IQ/OQ/PQ) and complete batch records.
Quality Assurance Vendor self-declared without required formal QMS. Mandatory QA/QC unit, Change Control, CAPA, and vendor audits.
Regulatory Impact High risk of IND rejection if used as a critical raw material. Required for IND/NDA filings, supported by Drug Master Files (DMF).

Footnotes

Regulatory Note: Governed by FDA (21 CFR Parts 210/211/312), EMA (EudraLex Vol 4), ICH Guidelines (E6/Q7/Q9/Q10), and compendial standards (USP <71>/<85>/<1043>).

Note: Technical data last updated: Sep 1, 2026.