A Study in Participants With Acute Major Bleeding to Evaluate the Ability of Andexanet Alfa to Reverse the Anticoagulation Effect of Direct and Indirect Oral Anticoagulants (Extension Study)

Summary

The purpose of this study was to evaluate the hemostatic efficacy of andexanet alfa (andexanet) in participants receiving a factor Xa (FXa) inhibitor (apixaban, rivaroxaban, edoxaban, enoxaparin) who were experiencing an acute major bleed. The safety of andexanet was also studied.

Timeline

Start

2015-04-10

Primary completion

2020-09-24

Completion

2020-09-24

Publications

• Results Connolly SJ, Milling TJ Jr, Eikelboom JW, Gibson CM, Curnutte JT, Gold A, Bronson MD, Lu G, Conley PB, Verhamme P, Schmidt J, Middeldorp S, Cohen AT, Beyer-Westendorf J, Albaladejo P, Lopez-Sendon J, Goodman S, Leeds J, Wiens BL, Siegal DM, Zotova E, Meeks B, Nakamya J, Lim WT, Crowther M; ANNEXA-4 Investigators. Andexanet Alfa for Acute Major Bleeding Associated with Factor Xa Inhibitors. N Engl J Med. 2016 Sep 22;375(12):1131-41. doi: 10.1056/NEJMoa1607887. Epub 2016 Aug 30.
• Results Birocchi S, Fiorelli EM, Podda GM. Andexanet Alfa for Factor Xa Inhibitor Reversal. N Engl J Med. 2016 Dec 22;375(25):2498-9. doi: 10.1056/NEJMc1613270. No abstract available.
• Results Connolly SJ, Crowther M, Eikelboom JW, Gibson CM, Curnutte JT, Lawrence JH, Yue P, Bronson MD, Lu G, Conley PB, Verhamme P, Schmidt J, Middeldorp S, Cohen AT, Beyer-Westendorf J, Albaladejo P, Lopez-Sendon J, Demchuk AM, Pallin DJ, Concha M, Goodman S, Leeds J, Souza S, Siegal DM, Zotova E, Meeks B, Ahmad S, Nakamya J, Milling TJ Jr; ANNEXA-4 Investigators. Full Study Report of Andexanet Alfa for Bleeding Associated with Factor Xa Inhibitors. N Engl J Med. 2019 Apr 4;380(14):1326-1335. doi: 10.1056/NEJMoa1814051. Epub 2019 Feb 7.
• Siepen BM, Polymeris A, Shoamanesh A, Connolly S, Steiner T, Poli S, Lemmens R, Goeldlin MB, Muller M, Branca M, Rauch J, Meinel T, Kaesmacher J, Z'Graggen W, Arnold M, Fischer U, Peters N, Engelter ST, Lyrer P, Seiffge D. Andexanet alfa versus non-specific treatments for intracerebral hemorrhage in patients taking factor Xa inhibitors - Individual patient data analysis of ANNEXA-4 and TICH-NOAC. Int J Stroke. 2024 Jun;19(5):506-514. doi: 10.1177/17474930241230209. Epub 2024 Mar 8.
• Milling TJ Jr, Middeldorp S, Xu L, Koch B, Demchuk A, Eikelboom JW, Verhamme P, Cohen AT, Beyer-Westendorf J, Gibson CM, Lopez-Sendon J, Crowther M, Shoamanesh A, Coppens M, Schmidt J, Albaladejo P, Connolly SJ; ANNEXA-4 Investigators. Final Study Report of Andexanet Alfa for Major Bleeding With Factor Xa Inhibitors. Circulation. 2023 Mar 28;147(13):1026-1038. doi: 10.1161/CIRCULATIONAHA.121.057844. Epub 2023 Feb 20.
• Costa OS, Connolly SJ, Sharma M, Beyer-Westendorf J, Christoph MJ, Lovelace B, Coleman CI. Andexanet alfa versus four-factor prothrombin complex concentrate for the reversal of apixaban- or rivaroxaban-associated intracranial hemorrhage: a propensity score-overlap weighted analysis. Crit Care. 2022 Jun 16;26(1):180. doi: 10.1186/s13054-022-04043-8.
• Huttner HB, Gerner ST, Kuramatsu JB, Connolly SJ, Beyer-Westendorf J, Demchuk AM, Middeldorp S, Zotova E, Altevers J, Andersohn F, Christoph MJ, Yue P, Stross L, Schwab S. Hematoma Expansion and Clinical Outcomes in Patients With Factor-Xa Inhibitor-Related Atraumatic Intracerebral Hemorrhage Treated Within the ANNEXA-4 Trial Versus Real-World Usual Care. Stroke. 2022 Feb;53(2):532-543. doi: 10.1161/STROKEAHA.121.034572. Epub 2021 Oct 14.
• Demchuk AM, Yue P, Zotova E, Nakamya J, Xu L, Milling TJ Jr, Ohara T, Goldstein JN, Middeldorp S, Verhamme P, Lopez-Sendon JL, Conley PB, Curnutte JT, Eikelboom JW, Crowther M, Connolly SJ; ANNEXA-4 Investigators. Hemostatic Efficacy and Anti-FXa (Factor Xa) Reversal With Andexanet Alfa in Intracranial Hemorrhage: ANNEXA-4 Substudy. Stroke. 2021 Jun;52(6):2096-2105. doi: 10.1161/STROKEAHA.120.030565. Epub 2021 May 10.

Drugs

Indications