A Clinical Trial to Evaluate the Efficacy and Safety of CKD-391 and CKD-331 in Patients With Primary Hypercholesterolemia

Inclusion Criteria: * Adults ≥ 19 years of age * Primary hypercholesterolemia * Patients willing and able to discontinue ongoing lipid-lowering therapy according to the opinion of the investigator Exclusion Criteria: * Secondary hypercholesterolemia * Conditions / situations such as: 1. Presence of any clinically significant uncontrolled endocrine/metabolic disease known to influence lipids levels 2. Severe renal impairment or active liver disease * History of hypersensitivity or allergies to investigational drugs or drug of similar chemical classes. * History of drug abuse or alcoholism within 24 weeks before screening * Any surgical or medical condition which might significantly affect the absorption, distribution, metabolism, or excretion of investigational drugs * Patients who have been taken with other investigational drugs within 8 weeks before screening