A Study to Test a Medicine (Fitusiran) Injected Under the Skin for Preventing Bleeding Episodes in Male Adolescent or Adult Participants With Severe Hemophilia

Brief summary (registry, in English)

This is a multicenter, multinational, open-label, one-way cross-over, Phase 3, single-arm study for treatment of hemophilia. The purpose of this study is to measure the frequency of treated bleeding episodes with fitusiran in male adult and adolescent (≥12 years old) participants with hemophilia A or B, with or without inhibitory antibodies to factor VIII or IX who have switched from their prior standard of care treatment. The total study duration will be up to approximately 50 months (200 weeks, 1 study month is equivalent to 4 weeks) and will include: * A screening period up to approximately 60 days, * A standard of care (SOC) period of approximately 6 study months (24 weeks), * A fitusiran treatment period of approximately 36 study months (144 weeks), * An antithrombin (AT) follow-up period of approximately 6 study months (24 weeks) but may be shorter or longer depending on individual participants AT recovery. The frequency for telephone visits will be approximately every 2 weeks. For site visits the frequency will be approximately every 8 weeks during the SOC period and approximately every 4 weeks during the fitusiran treatment period. If applicable and if allowed by local regulation, home and/or remote visits may be conducted during the study

What you commit to

• Study type: Interventional · Phase 3
• Participants enrolled: 91
• From 1 Feb 2023 to the primary completion date, 25 Mar 2027
• 54 sites in 17 countries
• Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Who the study is looking for

Age in the registry: 12 years to - · Sex: Male · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (54)

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