REG1 is being developed for use in patients undergoing percutaneous coronary intervention and the treatment of acute coronary syndrome. REG1 is associated with severe allergic reactions. In the phase 2b RADAR trial, 12 allergic-like reactions occurred shortly after administration of pegnivacogin in three patients with histories of allergy.
In one clinical trial, it was found that there was no evidence that REG1 reduced ischaemic events or bleeding compared with bivalirudin.
↑Becker RC, Chan MY (December 2009). "REG-1, a regimen comprising RB-006, a Factor IXa antagonist, and its oligonucleotide active control agent RB-007 for the potential treatment of arterial thrombosis". Curr. Opin. Mol. Ther. 11 (6): 707–15. PMID20072947.
↑Lincoff, A. Michael; Mehran, Roxana; Povsic, Thomas J.; Zelenkofske, Steven L.; Huang, Zhen; Armstrong, Paul W.; Steg, P. Gabriel; Bode, Christoph; Cohen, Mauricio G.; Buller, Christopher; Laanmets, Peep (2016-01-23). "Effect of the REG1 anticoagulation system versus bivalirudin on outcomes after percutaneous coronary intervention (REGULATE-PCI): a randomised clinical trial". Lancet. 387 (10016): 349–356. doi:10.1016/S0140-6736(15)00515-2. ISSN1474-547X. PMID26547100. S2CID10905525.