A Phase III Randomized, Double-Blind, Active-Controlled, Multicenter Study on the Efficacy and Safety of Ezetimibe/Atorvastatin/Amlodipine Combination in Patients With Comorbid Primary Hypercholesterolemia and Essential Hypertension.

Purpose: This study aimed to evaluate the efficacy and safety of triple combination of ezetimibe (Eze)/atorvastatin (Ato) 10/40 mg + amlodipine (Aml) 10 mg therapy for lowering the low-density lipoprotein cholesterol (LDL-C) and blood pressure compared with either Eze/Ato 10/40 mg or Aml 10 mg therapies in patients with comorbid primary hypercholesterolemia and essential hypertension.

Methods: This was a randomized, multicenter, double-blind, active-controlled, Phase III clinical trial. Participants underwent a wash-out period (2 weeks for nonfibrate medications, 6 weeks for fibrates) followed by 4 weeks of therapeutic lifestyle changes. Subsequently, 109 participants were randomly assigned to 3 groups: (1) Eze/Ato 10/40 mg + Aml 10 mg, (2) Eze/Ato 10/40 mg, and (3) Aml 10 mg. The coprimary end points were percentage change in LDL-C and change in mean sitting systolic blood pressure (SBP) compared with baseline at week 8.

Findings: A total of 109 participants were enrolled in the study, and there were no statistically significant differences in the baseline characteristics of participants across the 3 groups. After 8 weeks of treatment, the least-square (LS) mean (SE) of percent change from baseline in LDL-C was -57.95% (3.52%) for the Eze/Ato 10/40 mg + Aml 10 mg group and 8.93% (3.54%) for the Aml 10 mg group. The LS mean difference (SE) between these 2 groups was statistically significant at -66.88 (4.95) (95% CI, -76.77% to -56.99%) (P < 0.0001). Furthermore, at week 8, the LS mean (SE) change in mean sitting SBP between the Eze/Ato 10/40 mg + Aml 10 mg group and the Eze/Ato 10/40 mg group was -19.24 (2.42) mm Hg and -4.43 (2.56) mm Hg, respectively. The LS mean difference (SE) between the 2 groups was statistically significant -14.81 (3.53) (95% CI, -21.87 to -7.74) mm Hg (P < 0.0001). No serious adverse drug reactions occurred in any of the study groups.

Implications: Triple combination therapy with Eze/Ato + Aml has effectively reduced the LDL-C and SBP independently, compared with either Eze/Ato or Aml therapies over 8 weeks of treatment period. In terms of safety, there were no significant differences among the 3 treatment groups. This research lays the groundwork for the development of a triple fixed-dose combination in the future, which could improve patient convenience and adherence by reducing pill burden. Clinical Research Information Service (CRIS), Republic of Korea: KCT0006283.