An observational study in Acquired Hemophilia A, sponsored by Takeda. Recruiting at 4 sites in South Korea. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-11-09.
Sponsored by Takeda · Observational
Acquired hemophilia A (AHA) is a rare bleeding condition which prevents blood clotting. Acquired means that people are not born with this condition or have a family history of blood clotting conditions. People living with AHA can have sudden and severe bleeding. They also have longer bleeding compared to people without AHA.
The main aim of the study is to learn how safe OBIZUR is in adults with AHA.
Other aims are to see how effective OBIZUR is to control bleeding and how treatment is used in a routine clinical practice setting.
The treatment of the participants will be determined by the treating physicians.
During the study, data already existing in the participants' medical record and new data will be collected.
This is a prospective, and retrospective, multicenter, single-arm non-interventional post-marketing surveillance study.
Takeda is the lead sponsor of 1,026 studies on the registry; 89 are open to participants now.
Of its 178 completed or terminated interventional studies of FDA-regulated products, 154 (87%) have results posted.
Counted across the registry records on this site, refreshed daily.
Participants with AHA who are receiving OBIZUR Injection or initiate OBIZUR Injection treatment for the first time will be enrolled.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants with AHA who are receiving OBIZUR injection or initiate OBIZUR Injection treatment for the first time will be enrolled. Both retrospective and prospective participants data will be collected. Retrospective data will be collected from the date of first treatment with OBIZUR injection after the marketing authorization in Korea but before date of signed informed consent and prospective data will be collected from the date of signed informed consent. The treatment and follow up of the participants will be determined by the treating physicians according to her/his routine practice.
Drug: OBIZUR
OBIZUR injection.
Also known as: Susoctocog Alpha, Porcine Antihemophilic factor VIII, Recombinant, TAK-672
Number of Participants With Adverse Events (AEs), Causality to AEs, Serious AEs (SAEs) and AEs of Special Interest (AESI)
Number of participants with AEs, causality to AEs, SAEs and AESI will be reported. The investigator will assess the causal relationship (causality) between the medicinal product and the AE using his/her clinical expertise and judgment.
Time frame: Up to 3 months
Number of Participants With Expected/Unexpected AEs and SAEs
Unexpected AE is defined as AE that differs from the information in the product label in nature, severity, specificity, or outcome.
Time frame: Up to 3 months
Number of Participants With Adverse Drug Reactions (ADRs), Unexpected ADRs, Serious ADRs, Expected SADRs and Unexpected SADRs
An ADR refers to any undesirable and unintended reaction which occurs during or following the administration of the drug, and in which a causal relationship with the drug cannot be ruled out. In the event that a causal relationship with the drug remains unknown amongst reported adverse events, such reaction shall be considered an adverse drug reaction. Serious ADR means noxious or unintended response to a drug that occurs at any dosage and that requires in-patient hospitalization or prolongation of existing hospitalization, causes congenital malformation, results in persistent or significant disability or incapacity, is life-threatening or results in death. Unexpected ADRs is defined as ADR that differs from the information in the product label in nature, severity, specificity, or outcome.
Time frame: Up to 3 months
Number of Participants With Special Situation Report (SSR)
SSR include following events: Pregnancy: any case in which a pregnancy participant is exposed to a Takeda Product or in which a female participant or partner of a male participant becomes pregnant following Takeda product.; Breastfeeding: infant exposure from breast milk; Overdose: all information of any accidental or intentional overdose; Drug abuse, misuse or medication error: all information on medicinal product (MP) abuse, misuse of medication error (potential or actual); Suspected transmission of infectious agent: Suspected (in sense of confirmed or potential) transmission of infectious agent by a MP; Lack of efficacy of Takeda Product; accidental/occupational exposure; Use outside the terms of the marketing authorization, also known as "off-label" and "off-label use"; Use of falsified and counterfeit MP; Drug-drug and drug-food interactions; Inadvertent or accidental exposure with or without an AE; Unintended benefit.
Time frame: Up to 3 months
Percentage of Participants With Overall Bleeding Control
Overall Bleeding Control will be determined as either bleeding stopped or did not stop.
Time frame: Up to 3 months
Time to Achieve Bleeding Control With OBIZUR Injection
Time to achieve bleeding control will be assessed from initiation of OBIZUR Injection (start time) to the time to achieve bleeding control (stop time).
Time frame: Up to 3 months
Number of OBIZUR Injection Infusion Required to Achieve Bleeding Control
Number of OBIZUR injection infusion required to achieve bleeding control will be reported.
Time frame: Up to 3 months
Dose of OBIZUR Required to Stop the Bleeding
OBIZUR dose required to stop the bleeding will be reported.
Time frame: Up to 3 months
Percentage of Participants With Bleeding Events
Bleeding events will be evaluated and reported as re-bleed, concurrent bleed and subsequent bleed. Re-bleed: if it occurs in the same anatomical location and within 72 hours of the resolution of the previous bleeding. Concurrent bleed: if it occurs at the same time (that is, during treatment or within 72 hours of resolution) as previous bleed but at a different anatomical location. Subsequent bleed: if it is a new bleed occurring 72 hours after the resolution of the previous bleed (either in the same anatomical location or in a new one).
Time frame: Up to 3 months
Plan to share: Yes — Takeda provides access to the de-identified individual participant data (IPD) for eligible studies to aid qualified researchers in addressing legitimate scientific objectives (Takeda's data sharing commitment is available on https://clinicaltrials.takeda.com/takedas-commitment?commitment=5). These IPDs will be provided in a secure research environment following approval of a data sharing request, and under the terms of a data sharing agreement.
Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report
Access criteria: IPD from eligible studies will be shared with qualified researchers according to the criteria and process described on https://vivli.org/ourmember/takeda/. For approved requests, the researchers will be provided access to anonymized data (to respect patient privacy in line with applicable laws and regulations) and with information necessary to address the research objectives under the terms of a data sharing agreement.
Data sharing details ↗ · vivli.org
Started Jul 2025 (actual). Primary completion is estimated for Dec 2028, 41 months after the start.
Since we started tracking on Sep 25, 2026, the dates moved once, on Nov 9, 2026: primary completion Dec 2026 → Dec 2028 and completion Dec 2026 → Dec 2028.
Earlier changes are on the record history on ClinicalTrials.gov ↗
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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Factor 8 deficiency, acquired