Aficamten, developed by Cytokinetics, is a cardiac myosin inhibitor for treating obstructive hypertrophic cardiomyopathy (HCM), a condition causing thickened heart muscle and reduced cardiac function. FDA has accepted its NDA with a PDUFA target date of September 26, 2025, supported by Phase 3 trial SEQUOIA-HCM results showing improved exercise capacity. Previously granted Orphan Drug and Breakthrough Therapy Designations.