PCSK9 (proprotein convertase subtilisin kexin 9) monoclonal antibodies (mAb) are new therapeutic agents to lower efficiently LDL-cholesterol levels. New data from large clinical trials suggest that the addition of PCSK9 mAb to statins can reduce the incidence of major adverse cardiovascular events in very high risk patients. Alirocumab and evolocumab are two agents available in Switzerland with specific limitations for reimbursement. PCSK9 mAb should be considered in patients with clinical atherosclerotic cardiovascular disease (ASCVD), as well as in patients with familial hypercholesterolemia without ASCVD who have substantially high LDL-cholesterol levels despite the use of statin at maximally tolerated dose with or without ezetimibe, or intolerance to appropriate doses of several statins.