Comparison of the effect of 40 and 80 mg/day doses of atorvastatin on changes in lipid profiles among acute coronary syndrome patients: A randomized clinical trial study

Background: Statins play a vital role in the management of high-risk patients with atherosclerotic cardiovascular disease. The aim of this study was to evaluate the effect of two doses of 40 and 80 mg of atorvastatin on lipid profiles and inflammatory markers among patients with acute coronary syndrome (ACS). Materials and Methods: This single-blind, randomized clinical trial was conducted on 60 patients with ACS referred to Heshmatiyeh Hospital, Sabzevar, Iran. Eligible subjects were randomly assigned to either 80 mg/day (atorvastatin, 80 mg/day) or 40 mg/day intervention (atorvastatin, 40 mg/day) groups. Serum lipid profiles (low-density lipoprotein [LDL], high-density lipoprotein [HDL], triglyceride [TG], and total cholesterol), an inflammatory marker (creatine phosphokinase [CPK]), and liver function biomarkers (alanine aminotransferase, aspartate aminotransferase) were assessed before starting treatment and 3 months later. Results: According to the paired t-test, there was a significant difference before and after intervention in each group regarding mean LDL and HDL values (P < 0.05). The result of the ANCOVA test revealed that the LDL and CPK was substantially lower in the 80 mg/day group as compared to the 40 mg/day group after 3-month intervention (62.45 ± 16.78 mg for 80 mg/day vs. 73.63 ± 20.00 for 40 mg/day P = 0.040 and 84.85 ± 6.53 IU/L for 80 mg/day vs. 120.70 ± 6.41 IU/L for 40 mg/day P = 0.001, respectively). Although the mean of HDL, TG, and cholesterol in the 80 mg/day group was lower than that of the 40 mg/day group after implementing the intervention, these differences were not statistically significant (P > 0.05). Conclusion: Findings suggest that increasing the dose of atorvastatin decreases the mean serum levels of LDL and CPK but has no effect on the mean serum HDL levels and liver function biomarkers.