Merck begins Phase 3 clinical program for MK-0616

Merck announced the initiation of the company’s Phase 3 clinical program, CORALreef, for MK-0616, an investigational, oral proprotein convertase subtilisin/kexin type 9 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 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. PCSK9 is a validated target for lowering LDL cholesterol. However, there are no oral PCSK9 inhibitors available to physicians and patients. The Phase 3 CORALreef program follows robust Phase 2b results presented at ACC.23/WCC, in which MK-0616 significantly reduced LDL cholesterol compared to placebo at all doses studied in participants with hypercholesterolemia with a broad spectrum of atherosclerotic cardiovascular disease risk, including participants on high-intensity statin therapy. MK-0616 was generally well-tolerated.