An Expanded Access Program of Emicizumab in Participants With Hemophilia A With Inhibitors
Study Details
- Hemophilia A
- Biological: Emicizumab
- Diagnosis of congenital hemophilia A of any severity and documented history of high-titer inhibitor (that is \[i.e.\], greater than or equal to \[\>/=\] 5 Bethesda Units)
- History of treatment with episodic or prophylactic bypassing agents for at least the last 24 weeks
- \>/=6 (if on an episodic bypassing agent regimen) or \>/=2 (if on a prophylactic bypassing agent regimen) bleeds within 24 weeks prior to screening
- Currently using recombinant activated factor VII (rFVIIa) or are willing to switch to rFVIIa as primary bypassing agent for the treatment of breakthrough bleeds
- Adequate hematologic function, defined as platelet count \>/= 100,000 per microliters (mcL) and hemoglobin \>/=8 grams per deciliter (g/dL) at screening
- Adequate hepatic and renal function
- Inherited or acquired bleeding disorder other than hemophilia A
- Ongoing (or plan to receive during the study) immune tolerance induction (ITI) therapy or prophylaxis with FVIII with the exception of participants who have received a treatment regimen of FVIII prophylaxis with concurrent bypassing agent prophylaxis
- Treatment for thromboembolic disease within 12 months before Day 1 (with the exception of previous catheter-associated thrombosis for which antithrombotic treatment is not currently ongoing) or current signs of thromboembolic disease
- Other conditions (example \[e.g.\], certain autoimmune diseases) that may increase the risk of bleeding or thrombosis
- High risk for thrombotic microangiopathy (TMA), in the investigator's judgment
- History of clinically significant hypersensitivity associated with monoclonal antibody therapies or components of the emicizumab injection
- Use of systemic immunomodulators (e.g., interferon or rituximab) at enrollment or planned use during the study, with the exception of antiretroviral therapy
- Treatment with any of the following: An investigational drug to treat or reduce the risk of hemophilic bleeds within 5 half-lives of last drug administration before Day 1; A non-hemophilia-related investigational drug within the last 30 days or 5 half-lives before Day 1, whichever is longer; An investigational drug concurrently
- Any serious medical condition, treatment, or abnormality in clinical laboratory tests that, in the investigator's judgment, precludes the participant's safe participation in the study
Protocol Summary
This study is looking at how safe it is to switch from emicizumab to Mim8, in people with haemophilia A. Mim8 is a new medicine that is used to prevent bleeding episodes in people with haemophilia A. Mim8 works by replacing the function of the missing clotting factor VIII (FVIII). Mim8 will be injected under the skin using a pen-injector either once every week, once every two weeks or once every month. The participants will be trained in using the pen injector. The participants can choose themselves, in collaboration with the study doctor how often they get Mim8 in this study. When the participant will get their first Mim8 injection depends on their current treatment with emicizumab. The participants will get their first Mim8 injection at Visit 2. Participants will have between 6 and 27 Mim8 injections. The total number of injections participants will have depends on their dosing frequency. The study will last for about 6-12 months. While taking part in this study, there are some restrictions about what medicine participant can use. The study doctor will tell the participants more about this. In case the participants experience bleeds, these can be treated with additional haemostatic medicine as agreed with the study doctor. Female participants cannot take part if they are pregnant, breast-feeding or plan to get pregnant during the study period.