Objectives: To evaluate the safety and efficacy of the combination product niacin ER and simvastatin (NS) in patients with primary type II dyslipidemia and to descriptively compare flushing rates between two Titration Schedules for NS.
Inclusion Criteria: * Patient has primary Type II hyperlipidemia or mixed dyslipidemia. * If the patient is currently taking a lipid modifying medication other than Zocor \& he/she is willing to discontinue this medication * LDL-C levels and/or non HDL-C levels above normal. * Reasonable compliance with a standard cholesterol-lowering diet for a minimum of 4 weeks prior to screening and for the duration of the study. Exclusion Criteria: * Patient has an allergy, hypersensitivity, or intolerance to niacin, statins, or their derivatives. * HbA1c ≥ 9% in diabetic patients