Study to Describe the Allergic Reactions to Factor IX in Patients With Hemophilia B
A Retrospective Study to Describe the Incidence of Moderate to Severe Allergic Reactions to Factor IX in Patients With Hemophilia B
Sponsor: Wyeth is now a wholly owned subsidiary of Pfizer
Listed as NCT00195221, this observational or N/A phase trial focuses on Allergic Reactions and Hemophilia B and remains completed. Sponsored by Wyeth is now a wholly owned subsidiary of Pfizer, it has been updated 7 times since 2005, reflecting limited change activity. This study adds to the evidence base for this therapeutic area through structured, versioned documentation.
Status Flow
Change History
7 versions recorded-
Sep 2025 — Present [monthly]
Completed
-
Sep 2024 — Sep 2025 [monthly]
Completed
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Jul 2024 — Sep 2024 [monthly]
Completed
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Jan 2021 — Jul 2024 [monthly]
Completed
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Jun 2018 — Jan 2021 [monthly]
Completed
▶ Show 2 earlier versions
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Apr 2018 — Jun 2018 [monthly]
Completed
Phase: PHASE4 → None
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Jan 2017 — Apr 2018 [monthly]
Completed PHASE4
First recorded
Feb 2005
Trial started
Per CT.gov start date — pre-dates our first snapshot
Eligibility Summary
No eligibility information available.
Contact Information
- Wyeth is now a wholly owned subsidiary of Pfizer
For direct contact, visit the study record on ClinicalTrials.gov .