RAHWAY, N.J.–(BUSINESS WIRE)– Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced the initiation of the company’s Phase 3 clinical program, CORALreef, for MK-0616, an investigational, oral proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitor, being evaluated for the treatment of adults with hypercholesterolemia. This is the first Phase 3 clinical program for an oral PCSK9 inhibitor. The first participants are now enrolling in two registrational Phase 3 studies evaluating low-density lipoprotein (LDL) cholesterol reduction: CORALreef Lipids and CORALreef HeFH. Merck also plans to initiate a Phase 3 cardiovascular outcomes study, CORALreef Outcomes by the end of 2023.