Group 1 - The FDA has extended the PDUFA action date for Cytokinetics Inc's aficamten to December 26 from September 26 due to the need for additional time to review the proposed REMS [1][3] - Cytokinetics submitted the NDA for aficamten without an accompanying REMS, but the FDA later requested a REMS based on the drug's characteristics [2] - The submission of the REMS is considered a Major Amendment to the NDA, resulting in a standard three-month extension [3] Group 2 - Cytokinetics' CEO expressed confidence in the benefit-risk profile of aficamten and anticipates a differentiated label upon potential FDA approval [4] - Bristol Myers Squibb's Camzyos did not meet its primary endpoints in a recent Phase 3 trial, which may create an opportunity for aficamten [5] - Analysts believe Cytokinetics is well-positioned to benefit from Bristol Myers' groundwork, with expectations for aficamten to secure a differentiated REMS [6]