Objective: We sought to compare the effect of alternate-day versus daily atorvastatin 10 mg, on serum low-density lipoprotein cholesterol (LDL-C) and high-sensitivity C-reactive protein (hs-CRP) in patients with coronary artery disease (CAD) and controlled serum LDL-C by daily atorvastatin. Methods: The study was prospective, randomized, single-blinded, two-armed. Randomization was performed by a computer-generated randomization list. We randomized 60 patients with CAD and controlled serum LDL-C to receive either atorvastatin in the standard-dose of 10 mg daily (Group A=30 patients), or the same medication every other day (Group B=30 patients). Primary efficacy criterion included changes in serum LDL-C and hs-CRP from the initial to the 6-week follow-up values.