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An open-label, parallel, Phase 3, two-arm study to investigate the efficacy and safety of fitusiran prophylaxis in male participants aged 1 to less than 12 years with hemophilia A or B with or without inhibitory antibodies to Factors VIII or IX

Status
Not yet recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2025-521858-42-00
Acronym
EFC17905
Enrollment
26
Registered
2026-01-15
Start date
Unknown
Completion date
Unknown
Last updated
2026-01-19

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

Conditions

Hemophilia

Brief summary

Annualized treated bleeding rate (ABR) in the fitusiran primary efficacy period and in the SOC period.

Detailed description

Annualized spontaneous bleeding rate (AsBR) in the fitusiran primary efficacy period and in the SOC period., Annualized joint bleeding rate (AjBR) in the fitusiran primary efficacy period and in the SOC period, ABR in the fitusiran treatment period (160 weeks) for fitusiran-naïve participants., ABR in the fitusiran treatment period (60 weeks) for rolled-over participants, Change in physical activity, Change in pain intensity, Change in HRQoL, Incidence, severity, seriousness, and relatedness of adverse events (AEs), Change in total score and domain scores, Target joints resolution

Interventions

Sponsors

Sanofi-Aventis Recherche & Developpement
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
Male
Age
0 Years to 17 Years

Design outcomes

Primary

MeasureTime frame
Annualized treated bleeding rate (ABR) in the fitusiran primary efficacy period and in the SOC period.

Secondary

MeasureTime frame
Annualized spontaneous bleeding rate (AsBR) in the fitusiran primary efficacy period and in the SOC period., Annualized joint bleeding rate (AjBR) in the fitusiran primary efficacy period and in the SOC period, ABR in the fitusiran treatment period (160 weeks) for fitusiran-naïve participants., ABR in the fitusiran treatment period (60 weeks) for rolled-over participants, Change in physical activity, Change in pain intensity, Change in HRQoL, Incidence, severity, seriousness, and relatedness of adverse events (AEs), Change in total score and domain scores, Target joints resolution

Countries

Belgium, Germany, Hungary, Italy, Poland, Romania, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026